{
  "manageEntity": {
    "action": "Save",
    "entityId": "91703082",
    "entityType": "Track",
    "nonce": "0x11024f61d49a35be5ed2099e887ee7a7eed55b1761e054af9eed1184b20d77e1",
    "signature": "0x8ac055b5fccfec4d7d2219f1259e20dbca9dfe7ba6f79f76efbea285c3959c37104ff03400d5b6ec32e84cf57ccaef649be9f8c4e4de6eca783a0d02ab1f3f6d1b",
    "signer": "0x72d1844BB49347afC0912B6743298568BC02b404",
    "userId": "328108"
  }
}