{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466093439",
    "entityType": "Track",
    "nonce": "0xc737f847fd495e727427d93b5bbfa81391f2f4f1e1e32ee8d91accb36509d939",
    "signature": "0xe881d7cfcd144f87b1b045f90b3ee0eaf2fb568f04155d559c7694b57eb0f3e31ddfb37b74541cba03f4ccf0a486fc038f936c328a61d77db80f018f3d7e1e641b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}