{
  "manageEntity": {
    "action": "Update",
    "entityId": "125131485",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbc3f91368a5b1d6577b068b4163e4bd106f9df90fae70e668f23358389e4f907",
    "signature": "0x92428ace76c7b6e5a1dd8b423efb365772b01ba2425b4b3fac007541b6d867f97d942525df927509e4ccdc21f7a8ac4e1e31380319e469becf1974b809ce90571c",
    "signer": "0x21c1b9F1a86E51AD8642311E60C35862D7913fD8",
    "userId": "125131485"
  }
}