{
  "manageEntity": {
    "action": "Save",
    "entityId": "732525712",
    "entityType": "Track",
    "nonce": "0xe4c9fa142ebd0e120a857cc766cf1198f42e304e65d26f858a4f829e29e0e782",
    "signature": "0x67ac231ac87318d696213a7b3b94f4eaa247f4fcec0ff153be13d1f64942881c35d3006d0155715487c48ec832df3248523c964aa6f2734268c0fd4945a2457c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}