{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356055599",
    "entityType": "Track",
    "nonce": "1790150979932347088",
    "signature": "0x972843b5c020e2573b71cd0fdcc407b1ac7e2df92eecb30771ba7292e8d6319146e6ddf28ec7af868ae507acfbcfcd96a7f012bde54aee00a70c933a0baafedd1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}