{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777966851",
    "entityType": "Track",
    "nonce": "0xfe26b16429118ca0813808cf127dba98bd8efb7550f349c019dd977b27eb6bd8",
    "signature": "0xf617c57a97f695afde89554713864f60384d2c0b2eec3acf0c6f7489405ebbab5497c0226b8da71256fd2997455febbcc7504f1f06a11ed739490e9a1727e41d1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}