{
  "manageEntity": {
    "action": "Save",
    "entityId": "959926",
    "entityType": "Track",
    "nonce": "0xbe4398ed91dbeb2f81fc501296f7438f8307f5d154451dafce09e5f99686cbae",
    "signature": "0xaf180e3219d3644cf43f18bd904d4f5b52b2eb80fa506ac9689db11bb2ce73b5419ae1ed798f1c49d48b4a2e66c5f339a1bc09dfcbf0a0726cf425e3364e48ea1c",
    "signer": "0x6B2bcc2eabb83869700E692B27DdEe15d2030D3f",
    "userId": "870123056"
  }
}