{
  "manageEntity": {
    "action": "Save",
    "entityId": "1161125627",
    "entityType": "Track",
    "nonce": "1787816947651427674",
    "signature": "0x5c00ec131684e63806bc460f1ebc1c5903f84939626295333be830c6a69d2de525e9d1ef8998c558cf81fd2d6168637d5ccf0a7c08094b2f6bef09de5a3406241c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}