{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998844219",
    "entityType": "Track",
    "nonce": "0xb849a4e6e5cd7f90118614171b0cf51a3967ca332b99992eb01244dca0ecae43",
    "signature": "0x0fab2b6d06b7c971970ff7632bd45f513742b3dc4ef0c63facdddf00a611d47476fa1cb64af209fe84e171f45a512b4c0b32d5a79785ac0461ee2907739f838a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}