{
  "manageEntity": {
    "action": "Update",
    "entityId": "551829342",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x84fd0eff0a0f38eee5351208094a40aab9c2080f6f33f6d48c78b76f7aa1956c",
    "signature": "0x4298762964b6bba537b3f4c7b8a6ab3dd19b87a356b270db765714c08c147b1911920e0653abb4dde09b04cca40e65eb49ea3085f2535cebb2b871e25d7e09041c",
    "signer": "0x1495E84D34bBAa11b7435Cd8b0f64d9335C6d4ae",
    "userId": "551829342"
  }
}