{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622827979",
    "entityType": "Track",
    "nonce": "0xcad65745f332e289424c44fd08c5e8db3bb0a4538db714d3276f3f43c76487e4",
    "signature": "0x715d5797f3fe88267bdda89718700d4080ce160b52ca95bee557b68d72c3cd171b8dda3a032cb56d69764671b13fab46c313f1611780f9922bed2cb19cc63b5e1b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}