{
  "manageEntity": {
    "action": "Save",
    "entityId": "1691111148",
    "entityType": "Track",
    "nonce": "0x6ed20d8c019757bc97abe431a411d60ef84759558ef540d50cd00a7e6097cf50",
    "signature": "0x8be2689ea9ed171e216768bd1750c8cda6e877b4a027c83610b6f4860ff135f9221863159246e4c49996682b0be71d6c5aea39d346951245747f1b801dae7b691b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}