{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442913723",
    "entityType": "Track",
    "nonce": "0x5fc30852e98d1d720051a8a9b4bb6b08d0f766a19bff82a57c7a665d33cbe7de",
    "signature": "0xa5ba392c0ecf5b3191198d5fa23bfda5716bf97c529b66c234bb0658daddbe1a4d73b6259288e5aef519f1ab96c6bc4a1a070c0eded111ba3f061f4ae4f25bb01c",
    "signer": "0xD11E60b78D349bEEF08c055Fb75986129acF601B",
    "userId": "238411250"
  }
}