{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099472714",
    "entityType": "Track",
    "nonce": "0x954e1e8601e6dd2454c798d99260ca03d19fe738cb84091e5ae00a149d51e1f9",
    "signature": "0xadcd82f7e552157301ad44f680adcf4aa14f4d4091d114b9bf83e408d2f5ca7a3b791e73d1033fbf013198c0b3d36f41c7ee7e55d4131b07918c2a2a73971d5d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}