{
  "manageEntity": {
    "action": "Save",
    "entityId": "1682990839",
    "entityType": "Track",
    "nonce": "0xd01d45730d603247e4e44b3d4d00cdbe1e4c34ff44adf49bf92f1da9a709611b",
    "signature": "0x956b372bc373af1054a32ef5d794e59da5c2f395517ceda6b2f35afc8142f7736b0c8ec79a628497eb0d1f9eea27ce5cc6ea8ae61c462f1b5008abd43d9213c41b",
    "signer": "0x72d1844BB49347afC0912B6743298568BC02b404",
    "userId": "328108"
  }
}