{
  "manageEntity": {
    "action": "Save",
    "entityId": "1716105769",
    "entityType": "Track",
    "nonce": "0x1956c3f0e2f67cacf1bcdddc9dfedba9161a8afd4c39acf103f98ec1f377e275",
    "signature": "0x6e2c648df68740bc4c55cefe8a4f845163930eb49656b70f791b426bb085b5c85a2568e47362f614f10bdfbe9f1eff0c7f8c072bfe29d91a5ea0b6987869a00e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}