{
  "manageEntity": {
    "action": "Save",
    "entityId": "224227",
    "entityType": "Track",
    "nonce": "0x30d1fa479e197caea6b1d30eff13c00b8863a85b9d3c6ba1005d67c245f2e4f2",
    "signature": "0xf5c25da902007dae0b4149aacaf495a810db75413676fd086ebb953a6c4f49ed3de0f33dd56be05935e899dc38e277b59fe3d7bdcf4a2c6b01feabd319221e411b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}