{
  "manageEntity": {
    "action": "Save",
    "entityId": "854776",
    "entityType": "Track",
    "nonce": "0x745c70c7e71e689d17088d630b19689a82339e198c4f47fece929c5758146361",
    "signature": "0x6c7b5d170a980a55440aea75749e5b7234823bc69b7622f472fd57f696578ed744112b67e142deddade56d811f07242b3c7f9ab9d386c2c7c84fca2e3057e5111c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}