{
  "manageEntity": {
    "action": "Save",
    "entityId": "628220856",
    "entityType": "Track",
    "nonce": "0x2b104fffeba04d749213e23837a248a710275ae92e3e17827844d306f93deac1",
    "signature": "0x79437a0938fb6bb6cecddd49f1d6153153387303967424861c5d299a05c05e5336d421b9673d8fe69d9352cf8f4d3794231a329a74051139e3da2e59e3757ffd1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}