{
  "manageEntity": {
    "action": "Save",
    "entityId": "778678405",
    "entityType": "Track",
    "nonce": "0xe8cb011b76590791d29a92d1cfb708497e747b676210795ebc864be1df6dd3d6",
    "signature": "0x679b11c8e85749936e430cb27c02105f08a645d816cda17674202b61302c93f41b6d0f6f0cbcdf5dd27d1f0ffd27fc9f5824a4fe132d2d630a4b60a96d225ee81c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}