{
  "manageEntity": {
    "action": "Save",
    "entityId": "1282949248",
    "entityType": "Track",
    "nonce": "0x8898e067b8b57395ed79dc8ab72f5c8891bbc2de0f1788d6581ebda4c8fc822a",
    "signature": "0x6d77ced486d0bb3e63053a420292be9ab7b2fb8fc89d5aee95f8f21e9a117cd4563ee657f79b336108deb8357891f81fa9a4e46500b9e136df4efe8d2138a8b31b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}