{
  "manageEntity": {
    "action": "Save",
    "entityId": "2126416550",
    "entityType": "Track",
    "nonce": "1789784556511928008",
    "signature": "0xe78673452b36be6a6b86bb5eb570d42255a9efe7250eaee6805c2cc3561b18c539547aa1c17b231e11863453ecfa06126c05d5e4f0e832a49adfe794c63626ae1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}