{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001456466",
    "entityType": "Track",
    "nonce": "0x6c36ab906f000709fb1a715d1a571f1e841926fd7a69e216be2f4b96bb10ffc6",
    "signature": "0xb117be265abafd7cb25c06ec7f258069b00b2dc042ca880ed291ec2c787cb320257ec4ee3632032bf7c8f0525b3aaf7cbeb50e5b4af9d46cb4346f4ea5e022e01b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}