{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075785",
    "entityType": "Track",
    "nonce": "0x3bd7f50d7ead61fb3c2a449b236e2f656016cf64d3a4878138c0ce486726deda",
    "signature": "0x5826c8a9d0a87c850eec3fef71ae5ca006ffa46bcc8127137e235b893387552009650da7d3cb6ecae34598f80c43a6934ee687781d1c3cbc9f67490ba009ea8c1b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}