{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461131092",
    "entityType": "Track",
    "nonce": "1792327172729444496",
    "signature": "0xc878056ae5f4a663417fd3e2fc3a4d6ca45b0a8f99ac121fc2ee6d2ff19c982268856864efe2eb50dac39d298f491fb232b7570be73c4bc92a22d6621ad387be1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}