{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118185922",
    "entityType": "Track",
    "nonce": "0xf42468ed4eb4f48b1feb94f808933de4d82900aac5941297810af30e6a7ece1c",
    "signature": "0xa50a1d0b18f2dc0e1cc586c4b0e5a10d5ab386ea8b07ada2fbb7e9fe04cc84bf2597454a01046b566dee60448806a08089f457cf68d122a6337509fbee18707e1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}