{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127986650",
    "entityType": "Track",
    "nonce": "0x135596808d0d6b8299847e3bcf4c30002f28f5f2f5fac99be788dc00acea8abe",
    "signature": "0xd5af80ade7c81134a361bdd625b5ffd8e2e2a48273e884c1a70bcfda87462ef821051ac48546c9ddaa7d247f3dfeedef62ab73bb10f80502daa29cd0dc46b8341c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}