{
  "manageEntity": {
    "action": "Save",
    "entityId": "896525591",
    "entityType": "Track",
    "nonce": "1790719223263280356",
    "signature": "0x7a8836df5ca306a3048ccb8ff1377ae0a3fff458d426ceeca499ced67400127571d3a00c60e636a04e5d31a60ac34462103704504ca8124254bfaa602d34d3d31c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}