{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333052259",
    "entityType": "Track",
    "nonce": "1789419946749315559",
    "signature": "0x80bc27c3e6cfbfc209f314f7060787faf817ce791cdc14cf4062824439c0be632307fc6a5e05fbe5441205821880dfba20b5eb354d04a4df14f060fce169f6f31c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}