{
  "manageEntity": {
    "action": "Save",
    "entityId": "874639685",
    "entityType": "Track",
    "nonce": "0x5c3dff1c7c81da11aa7140a6c2bb3cee6a756e6cfa8f7b6c954b53c733583b10",
    "signature": "0x63dd2de42519c1fb8633df89ee98de640acbec63758ed3c25c8eb3503ad6c1492ddae1d9d209e4cd712bca9bebcef76ce3913702da1752efceff6300e2afeb961b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}