{
  "manageEntity": {
    "action": "Save",
    "entityId": "568196900",
    "entityType": "Track",
    "nonce": "0xe7cb6b759725c82d3473ba6488ed42182f07035fa9ab61faf0d61c2f65bdd197",
    "signature": "0x15b9736fe062843d0251c935680b7da4f0c6cec2500d35c83ddf73fe6d175102114081053879afc7a6c054cf20fca0d62e2abbd462fa0f52b45c25c0b94439981c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}