{
  "manageEntity": {
    "action": "Save",
    "entityId": "532214",
    "entityType": "Track",
    "nonce": "0x76c3e70b077f315f6d0cb1951d8cfcabf25aaed8dfeabd136dc182165da43282",
    "signature": "0xaba798e04389fa2f575f77a98caf8057a294c50002156820e32b7b9235584465245f76ad287d99fd7821d60e8eefa12ec369551640dc7d93e5ac23bac4f2dc4b1c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}