{
  "manageEntity": {
    "action": "Save",
    "entityId": "436989294",
    "entityType": "Track",
    "nonce": "0x272127cca53174cfa26780517950dd49c7f6f5e43c5ffbbb98c0b66bb585f014",
    "signature": "0xab97969e0fa1b102c3891b95783851b1ea74c53154830108239ce145a81ac6950202330d9164c36cfecc0aa118161db4a00075295522f409c947972c3cec96021c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}