{
  "manageEntity": {
    "action": "Save",
    "entityId": "606571920",
    "entityType": "Track",
    "nonce": "0x40d1bd92f7108f5e08788f26bb384392b91ab4c8fdcd5dccf42f87e7c9075466",
    "signature": "0x7ba7e40110cdd0003c506019896741684ef3ddb37701e79cd4859f960c0443d57b691541603c1039a20ed5cf859952ad87cf94676828fbfa9c8bc93625e59aa51c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}