{
  "manageEntity": {
    "action": "Save",
    "entityId": "589358997",
    "entityType": "Track",
    "nonce": "0xeba44226404bc0824d055bc46f5fa190b6f5cc8fbbe82b1268283ed53b2281b1",
    "signature": "0x914e9188580d045a1ce28b2e9781616d85ec4941bc8cbb08b80e6000d614b8bb1ba382b789ef6b80c34bdcbd79d55a69916b676d64138779b524b3e715731ba41b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}