{
  "manageEntity": {
    "action": "Save",
    "entityId": "850624680",
    "entityType": "Track",
    "nonce": "0x5c57798c96c7bf269b2c34e78b0df067bafb6eeaecd7623d0486ee4df67d27f1",
    "signature": "0xbcfc688fea67043321d1abfeb4b0ec438a591834c30b534e77b430f78df49e4d2af600efdbe349456e78c0332da57dcc3f15f4682e8b5f97d88010845b2aeab01c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}