{
  "manageEntity": {
    "action": "Save",
    "entityId": "1976011090",
    "entityType": "Track",
    "nonce": "0x9fcb4232fd96b49dcce6f29947ed8a26f5db8eac3f90c89219a847abeca1319b",
    "signature": "0x55a9929621116b2439c94c067132768a5c3688de3874f1997f2946f6ff4671533e3fa60a59a712419679bbdf47cfee8b3fac7680cade754a74fd2c726c1770681c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}