{
  "manageEntity": {
    "action": "Save",
    "entityId": "2105327539",
    "entityType": "Track",
    "nonce": "0xeab3ae9e958f361f4a067d9f4e0018f0014e97cbb13123a5a5237d2d9171723f",
    "signature": "0xe1db9c9db8032e7fc3d76adffe666d9ccd3a01d4e9b6214173628f6132db29a02d976912c645a2106e4c9298283f6d1850700a60109d9670b73eab1a401776611b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}