{
  "manageEntity": {
    "action": "Save",
    "entityId": "974724139",
    "entityType": "Track",
    "nonce": "0xbe6c8d3b4fb071a7a60b6eaebbbbed298d9cb1843aa814fea83bc70eeff5fc19",
    "signature": "0x61609f275e9d93d39e5b3324885c1b3fab5fff3cda6b7738caa44908861dbf5b05286c7f34f6811681255df494003d01027f13de0ccc4118b507f7dc49d610651c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}