{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564855223",
    "entityType": "Track",
    "nonce": "0x7df404d7e88d2a42a1d44f62a4c6c8b43693095378dce500b6dcab69f8ef9f13",
    "signature": "0x4121d771d7240de73b015be94ab51ba86d7a581eecc8a3e047d75865cc8b3fc70fac387b33c8df42d34d8b3698a58d44b95b89868057ed866080fc7fba6a52701c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}