{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217221200",
    "entityType": "Track",
    "nonce": "0x0bf983a87dffa7cc66e6b590e0951ba0bff86a225d32cb3979db446d3824dcb6",
    "signature": "0x36eee49893846a9b63ed1624d58fed3f97b65c856b4bff9d90201b334e9d13761005ead3c4ee15018a2fed8b205bfae7da475e4cb5f1e8c474bbcfc5a5a9cf141c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}