{
  "manageEntity": {
    "action": "Save",
    "entityId": "799385",
    "entityType": "Track",
    "nonce": "0xfedcdabc00d5a02e8f2ced1ba5fe738936de2923ccd696f2f375dd6ec9a4113a",
    "signature": "0x766859037a3296895a245c683d6bcd2706f3674b3108a241944e75375974c486365a9dac9da060a995be975db23b1d599980edafbdf021f9608b27ddd2de57cc1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}