{
  "manageEntity": {
    "action": "Save",
    "entityId": "250019551",
    "entityType": "Track",
    "nonce": "1793018949262177504",
    "signature": "0x00594e81d1724d6e02d375effcce5d3332d8374842e91b04e1d02e94f7f413b84f7e8dd0a5142c2374c14de9d46474e6fdee8ebd08345f9d510feae6608d222d1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}