{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984897033",
    "entityType": "Track",
    "nonce": "0xe5134acbf174dd872be3d03b6cd396ed9d886b6afb8298fd72961b4491aa2245",
    "signature": "0xed83e773aa29b141cc380a0b2270bc1f7b11b52521baf3d1ab7399e25b84f7445e13bcfe7ed4b1394a5b7823a503636b39e4b1b865e7114b83fb49dd85be69041b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}