{
  "manageEntity": {
    "action": "Save",
    "entityId": "434226414",
    "entityType": "Track",
    "nonce": "0xbc343f5bc9fe7563ed1ead511be423c451564f7bc430c3f1022e08837b4dc8b7",
    "signature": "0xde3cc1fef391e9158997888711c17f7b8d334ddbff02ac69d118fa5bd260c5510adfb8e5a3b234033544eea70281368962d96787af9d2d1b3e57e4030a924ca01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}