{
  "manageEntity": {
    "action": "Save",
    "entityId": "1465190541",
    "entityType": "Track",
    "nonce": "0x52820b25c85ec1f597521eb94d0f61da8a2f98720275215f8883feb4a869acae",
    "signature": "0x3651a990b1e8f6b7191d6272f5e7dbbca3f55cad60b59f1af47835c5c9309b7264b4c430a37fdeac49a04ccdc80688d0da714c1ee84a88ecc0bbeb6475ad3cc61b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}