{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913667456",
    "entityType": "Track",
    "nonce": "0x07b251df2eafb87d403e8565ddeb82f7921ca88447dbb1cb91fc56c1a2b521cd",
    "signature": "0x24ad74950a78e5adeb28defa5ea586b4dc131bb751e0fa48498db3cdeb253cf06c88215d920b7af211831439de082911f7f0723dc7a78b4b2d05e1ce776605321b",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}