{
  "manageEntity": {
    "action": "Save",
    "entityId": "51631",
    "entityType": "Track",
    "nonce": "0x6e4c73a48b272455c5b6f9999b695d9a4abe063aac352a7f2281827111f18952",
    "signature": "0x226bf9e61a44c5baee740e9b9ab291a21cdbce050731cdfac4e3b75c1b01a5c01bdb72e2dba1e029d791e7d51c962fab770124d4030793796000457ebcc1be561c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}