{
  "manageEntity": {
    "action": "Save",
    "entityId": "636351566",
    "entityType": "Track",
    "nonce": "0x8f6349a7e69acc1138fb83769fb63c7533840dd7708380ab284c3ea7bb520f1a",
    "signature": "0x9bcdf59dc3ce3f2a11cb43c677b03b4073b619af8de62265a9ece6e48f0cd1a430ac6898ffcf0e1c1918dc81ff4c980e40ee5276eca9855eb237c5de51429c311c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}