{
  "manageEntity": {
    "action": "Save",
    "entityId": "1155786971",
    "entityType": "Track",
    "nonce": "0xbbb672ebded51a78d2a69924aeaf488d3a705eaab23426da640d2a0a117479cc",
    "signature": "0x322a156287306ff9e16b8e668f0a50864479f3c29ec47481dd14405dad16ab3e3b928f0783bde2dd07a06284dd6d56eaa50dd3d236714ce621897d9e65d4da821c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}