{
  "manageEntity": {
    "action": "Save",
    "entityId": "400936483",
    "entityType": "Track",
    "nonce": "0xf8153b9ee9c70ac930b7f853ad8297c6f16633ff4cfd24e12b5f1d756a0880d8",
    "signature": "0x6059059b57f422325c4e65975b84fb0b552bf672e6bc71460158aaed258d82f127ffe2d0a556a5d921ea085326ad064a29f2deb7099715084fc7427fed9a46801c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}