{
  "manageEntity": {
    "action": "Save",
    "entityId": "1365161600",
    "entityType": "Track",
    "nonce": "0x66ecaf26f2b6b523c743afdca3c6c3522cf41d0c40efa1bc6d21b3112c9e7f5c",
    "signature": "0xa74c23ca38d7b6045f4994d9b217727314d66e22f715ca5fda0c8b03a26f56823860c927f105776f179819531f8dc5d07319642d02fd1777dce909559bda052b1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}