{
  "manageEntity": {
    "action": "Save",
    "entityId": "1494266848",
    "entityType": "Track",
    "nonce": "0x61fac74d797b10054ae1acceff01dc965f924949127a540d39fb1798bbf6c01d",
    "signature": "0x23817bbd8bd7a7f6be1d9a7529f990ac450b914b6b89a6b22d72064eb85312ee223ab1667a6d74242db51ae44fc63a3c8074d1f12a99cd49245ed89da1b83e6e1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}