{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054947499",
    "entityType": "Track",
    "nonce": "0x9aac72e101db0542f500a4824fbd61d5a8f5e1a8c5135b0bf81b05b6cd1ee4b2",
    "signature": "0x2592450748bfda4aae643e1c8470fe3dc311f0dd3504f97af10bc420378788b53a4d4331e3371bd663aa3b25c1291fe3a1c671bd6f611fbbe7b94ca61deea1d31c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}