{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770116218",
    "entityType": "Track",
    "nonce": "0x84bbaf8fdb0abdded4d186aed5b606897c854b6e3da9116ba6095b27663a253a",
    "signature": "0xf406ba94a572ba4e2fec7c2b33cbf1e4fb3ca89bf6ce5cce69aae2ce3ebe2892196e5eb4d19637fb8f5d504bea3a16792062f3a5d4a477375ad49e2bdace0c451c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}