{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791642831",
    "entityType": "Track",
    "nonce": "0xb54feed81b96ad8890a234103c90160b3a3644f8695e3935469e4bd5be77e23e",
    "signature": "0x405cfa2825c976b8881e4da7937fe701dfd0ef9367c70e76fb4dcd6b9e0a1d05712bda59e86370e68bd43acd8a78ca4d79d93170208b0358251e5e066ee335411b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}