{
  "manageEntity": {
    "action": "Save",
    "entityId": "634992922",
    "entityType": "Track",
    "nonce": "0x1647ac5a19bbae2bf1ee4c86bbef7bf295d72c9aaee86df50481f4f7c5e7fe55",
    "signature": "0x0f1cbc9716092ac7468f26ca8cf2079c770fe656131713e12fa2e7800702fee15f8fbf7e611e21e8ff28988ee71a9367bfe55a9231628abcdb3492504e6e545c1c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}