{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618279634",
    "entityType": "Track",
    "nonce": "1786352495166976024",
    "signature": "0xbe6ab8ecb3b0de90e81d69eb2066b05c972ce9b785a0c1b706e1a7fad2a6a24e2e5c7362c51735d4fffd3b099826aaa2de0c84faf9bad9288d59b9bafaa8423e1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}