{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441782406",
    "entityType": "Track",
    "nonce": "0x060fd63fcb3ab24fb62f80f6c319a9225335a71cd366b36d2f3b4f08eee06080",
    "signature": "0xbafc2a9fe8ee42431edbfc7e78d2fda04fd8902a838a4147e6c36a03a63abcdf576038db21648fc47ef72cff51d02e0a9594ec65e3ded94c7ef83e612f1a15301b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}