{
  "manageEntity": {
    "action": "Save",
    "entityId": "370936070",
    "entityType": "Track",
    "nonce": "0xc0d34a63aabd35b1c6dca831c197c68b3721848b36c46bee94d90cc90ca335da",
    "signature": "0x3cbdef14e3dcbf7003ce131de1088cbbedb2ae53773523753fb35add90d81fc5008e7113f8c3f5baad86ea9c5bc5021e0821c178be42c0c90bfdac914d9051d51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}