{
  "manageEntity": {
    "action": "Save",
    "entityId": "1517958698",
    "entityType": "Track",
    "nonce": "0xa7ab568f12a747439ca9cf87c3a886d8b335414fc89b71d021f776e779f5125e",
    "signature": "0x42401e830ebffacecb9117be3de1add0fbbed2a4d69ee4c6f013e886de2387152ff263421ce870b5949d169c55f4a172fc0d8c3f4934fdd4b4524b6beb10a8021c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}