{
  "manageEntity": {
    "action": "Save",
    "entityId": "555960349",
    "entityType": "Track",
    "nonce": "1792355886366753411",
    "signature": "0x8fc4e2b82de932d274db8c93d6b1f99acec81467192f074ce2e85b8ff7c11d355e18b6d93d016a5ea349e9cb76a174eb3283123b87011c850fece8c1c27266c11b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}