{
  "manageEntity": {
    "action": "Save",
    "entityId": "480248",
    "entityType": "Track",
    "nonce": "0xf6a248eeb12bfd27a16dd4b4e03236d9abc5835452c3bc1aefe98c6bb3965e06",
    "signature": "0xc22f5dc946a0cec763753b2eb70d4d84aeea2ffe63701ddac77614d012e01675611d96d9d36132470f92700a49b5a04d80ff6dffe2359c2e390d55eb021d6daa1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}