If that's the case... I think It would be nice to have a simple GUI capable of doing the translation in order to facilitate the layer/table creation process through the REST API. Something like this:
{
"layers": [{
"currentVersion": 10.51,
"id": 0,
"name": "Point_layer",
"type": "Feature Layer",
"displayField": "",
"description": "",
"copyrightText": "",
"defaultVisibility": true,
"editingInfo": {
"lastEditDate": null
},
"relationships": [],
"isDataVersioned": false,
"supportsAppend": true,
"supportsCalculate": true,
"supportsTruncate": true,
"supportsAttachmentsByUploadId": true,
"supportsAttachmentsResizing": true,
"supportsRollbackOnFailureParameter": true,
"supportsStatistics": true,
"supportsAdvancedQueries": true,
"supportsValidateSql": true,
"supportsCoordinatesQuantization": true,
"supportsApplyEditsWithGlobalIds": false,
"advancedQueryCapabilities": {
"supportsPagination": true,
"supportsPaginationOnAggregatedQueries": true,
"supportsQueryRelatedPagination": true,
"supportsQueryWithDistance": true,
"supportsReturningQueryExtent": true,
"supportsStatistics": true,
"supportsOrderBy": true,
"supportsDistinct": true,
"supportsQueryWithResultType": true,
"supportsSqlExpression": true,
"supportsAdvancedQueryRelated": true,
"supportsCountDistinct": true,
"supportsLod": true,
"supportsReturningGeometryCentroid": false,
"supportsQueryWithDatumTransformation": true,
"supportsHavingClause": true,
"supportsOutFieldSQLExpression": true
},
"useStandardizedQueries": true,
"geometryType": "esriGeometryPoint",
"minScale": 0,
"maxScale": 0,
"extent": {
"xmin": -20037508.342788905,
"ymin": -8175201.3721496435,
"xmax": -10018754.171394452,
"ymax": 12175461.54272524,
"spatialReference": {
"wkid": 102100
}
},
"drawingInfo": {
"renderer": {
"type": "simple",
"symbol": {
"type": "esriPMS",
"url": "RedSphere.png",
"imageData": "iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAACXBIWXMAAA7DAAAOwwHHb6hkAAAAGXRFWHRTb2Z0d2FyZQBQYWludC5ORVQgdjMuNS4xTuc4+QAAB3VJREFUeF7tmPlTlEcexnve94U5mANQbgQSbgiHXHINlxpRIBpRI6wHorLERUmIisKCQWM8cqigESVQS1Kx1piNi4mW2YpbcZONrilE140RCTcy3DDAcL/zbJP8CYPDL+9Ufau7uqb7eZ7P+/a8PS8hwkcgIBAQCAgEBAICAYGAQEAgIBAQCAgEBAICAYGAQEAgIBAQCDx/AoowKXFMUhD3lQrioZaQRVRS+fxl51eBTZUTdZ41U1Rox13/0JF9csGJ05Qv4jSz/YPWohtvLmSKN5iTGGqTm1+rc6weICOBRbZs1UVnrv87T1PUeovxyNsUP9P6n5cpHtCxu24cbrmwKLdj+osWiqrVKhI0xzbmZ7m1SpJ+1pFpvE2DPvGTomOxAoNLLKGLscZYvB10cbYYjrJCb7A5mrxleOBqim+cWJRakZY0JfnD/LieI9V1MrKtwokbrAtU4Vm0A3TJnphJD4B+RxD0u0LA7w7FTE4oprOCMbklEGNrfdGf4IqnQTb4wc0MFTYibZqM7JgjO8ZdJkpMln/sKu16pHZGb7IfptIWg389DPp9kcChWODoMuDdBOhL1JgpisbUvghM7AqFbtNiaFP80RLnhbuBdqi0N+1dbUpWGde9gWpuhFi95yL7sS7BA93JAb+Fn8mh4QujgPeTgb9kAZf3Apd2A+fXQ38yHjOHozB1IAJjOSEY2RSIwVUv4dd4X9wJccGHNrJ7CYQ4GGjLeNNfM+dyvgpzQstKf3pbB2A6m97uBRE0/Ergcxr8hyqg7hrwn0vAtRIKIRX6Y2pMl0RhIj8co9nBGFrvh55l3ngU7YObng7IVnFvGS+BYUpmHziY/Ls2zgP9SX50by/G9N5w6I+ogYvpwK1SoOlHQNsGfWcd9Peqof88B/rTyzF9hAIopAByQzC0JQB9ST5oVnvhnt+LOGsprvUhxNIwa0aY7cGR6Cp7tr8+whkjawIxkRWC6YJI6N+lAKq3Qf/Tx+B77oGfaQc/8hB8w2Xwtw9Bf3kzZspXY/JIDEbfpAB2BKLvVV90Jvjgoac9vpRxE8kciTVCBMMkNirJ7k/tRHyjtxwjKV4Yp3t/6s+R4E+/DH3N6+BrS8E314Dvvg2+/Sb4hxfBf5sP/up2TF3ZhonK1zD6dhwGdwail26DzqgX8MRKiq9ZBpkSkmeYOyPM3m9Jjl+1Z9D8AgNtlAq6bZ70qsZi+q+bwV/7I/hbB8D/dAr8Axq89iz474p/G5++koHJy1sx/lkGdBc2YjA3HF0rHNHuboomuQj/5DgclIvOGCGCYRKFFuTMV7YUAD3VDQaLMfyqBcZORGPy01QKYSNm/rYV/Nd/Av9NHvgbueBrsjDzRQamKKDxT9Kgq1iLkbIUDOSHoiNcgnYHgnYZi+9ZExSbiSoMc2eE2flKcuJLa4KGRQz6/U0wlGaP0feiMH4uFpMXEjBVlYjp6lWY+SSZtim0kulYMiYuJEJXuhTDJ9UYPByOvoIwdCxfgE4bAo0Jh39xLAoVpMwIEQyTyFCQvGpLon9sJ0K3J4OBDDcMH1dj9FQsxkrjMPFRPCbOx2GyfLal9VEcxstioTulxjAFNfROJPqLl6Bnfyg6V7ugz5yBhuHwrZjBdiU5YJg7I8wOpifAKoVIW7uQ3rpOBH2b3ekVjYT2WCRG3o+mIGKgO0OrlIaebU/HYOQDNbQnojB4NJyGD0NPfjA0bwTRE6Q7hsUcWhkWN8yZqSQlWWGECAZLmJfJmbrvVSI8taK37xpbdB/wQW8xPee/8xIGjvlj8IQ/hk4G0JbWcX8MHPVDX4kveoq8ocn3xLM33NCZRcPHOGJYZIKfpQyq7JjHS6yJjcHujLHADgkpuC7h8F8zEVqXSNC2awE69lqhs8AamkO26HrbDt2H7dBVQov2NcW26CiwQtu+BWjdY4n2nZboTbfCmKcCnRyDO/YmyLPnDlHvjDH8G6zhS9/wlEnYR7X00fWrFYuWdVI0ZpuhcbcczW/R2qdAcz6t/bRov4mONeaaoYl+p22rHF0bVNAmKtBvweIXGxNcfFH8eNlC4m6wMWMusEnKpn5hyo48pj9gLe4SNG9QoGGLAk8z5XiaJUd99u8122/IpBA2K9BGg2vWWKAvRYVeLzEa7E1R422m2+MsSTem97nSYnfKyN6/mzATv7AUgqcMrUnmaFlLX3ysM0fj+t/b5lQLtK22QEfyAmiSLKFZpUJ7kBRPXKW4HqCYynWVHKSG2LkyZex1uO1mZM9lKem9Tx9jjY5iNEYo0bKMhn7ZAu0r6H5PpLXCAq0rKJClSjSGynE/QIkrQYqBPe6S2X+AJsY2Ped6iWZk6RlL0c2r5szofRsO9R5S1IfQLRCpQL1aifoYFerpsbkuTImaUJXuXIDiH6/Ys8vm3Mg8L2i20YqsO7fItKLcSXyn0kXccclVqv3MS6at9JU/Ox+ouns+SF6Z4cSupz7l8+z1ucs7LF1AQjOdxfGZzmx8Iu1TRcfnrioICAQEAgIBgYBAQCAgEBAICAQEAgIBgYBAQCAgEBAICAQEAv8H44b/6ZiGvGAAAAAASUVORK5CYII=",
"contentType": "image/png",
"width": 15,
"height": 15
}
}
},
"allowGeometryUpdates": true,
"hasAttachments": true,
"htmlPopupType": "esriServerHTMLPopupTypeNone",
"hasM": false,
"hasZ": false,
"objectIdField": "OBJECTID",
"uniqueIdField": {
"name": "OBJECTID",
"isSystemMaintained": true
},
"globalIdField": "",
"typeIdField": "",
"fields": "fields": [{
"name": "OBJECTID",
"type": "esriFieldTypeOID",
"actualType": "int",
"alias": "OBJECTID",
"sqlType": "sqlTypeInteger",
"nullable": false,
"editable": false,
"visible": true,
"domain": null,
"defaultValue": null
},{
"name": "START_DATE",
"type": "esriFieldTypeDate",
"actualType": "datetime2",
"alias": "START_DATE",
"sqlType": "sqlTypeTimestamp2",
"length": 8,
"nullable": true,
"editable": true,
"visible": true,
"domain": null,
"defaultValue": null
}, {
"name": "EVENT_TITLE",
"type": "esriFieldTypeString",
"actualType": "nvarchar",
"alias": "EVENT_TITLE",
"sqlType": "sqlTypeNVarchar",
"length": 256,
"nullable": true,
"editable": true,
"visible": true,
"domain": null,
"defaultValue": null
}, {
"name": "CATEGORY",
"type": "esriFieldTypeInteger",
"actualType": "int",
"alias": "CATEGORY",
"sqlType": "sqlTypeInteger",
"nullable": true,
"editable": true,
"visible": true,
"domain": null,
"defaultValue": null
}],
"indexes": [],
"types": [],
"templates": [{
"name": "New Feature",
"description": "",
"drawingTool": "esriFeatureEditToolPoint",
"prototype": {
"attributes": {}
}
}],
"supportedQueryFormats": "JSON, geoJSON",
"hasStaticData": false,
"maxRecordCount": 2000,
"standardMaxRecordCount": 32000,
"tileMaxRecordCount": 8000,
"maxRecordCountFactor": 1,
"capabilities": "Query,Editing,Create,Update,Delete,Sync",
"syncEnabled": true,
"adminLayerInfo": {
"geometryField": {
"name": "Shape",
"srid": 102100
}
}
}],
"tables": []
}