{
  "manageEntity": {
    "action": "Update",
    "entityId": "666512345",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb0f60c086a16544ed4d68622cbfb7a2b0e43ca9c0ee91033b70148d6daa2dedf",
    "signature": "0xe96656f3350c14ef9a907310cb14dcf076b87c577cd11d3f1ae84892fbd3ba1d0b91aeba2d9826e8fe89742d02831131696d48bb78adc04f2d35bc95fcc9318c1c",
    "signer": "0x1Bd8D1F59efeea4aC492ccaD54406020AB908D80",
    "userId": "666512345"
  }
}