{
  "manageEntity": {
    "action": "Update",
    "entityId": "144851916",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9314173421b1e496976997c3c89aa40a342607631da2dcb25ff1663ff7a36827",
    "signature": "0x8a3f96b432ee51d4407a60a60f15feee31893be267825360beb2d21bfe3b567405bebd5e48d209728d8e2927ce4edff83a5c699cd437637c458a2cb08a0dceac1b",
    "signer": "0x8EB9E5b548D184382DaDe321741Fad97176bB210",
    "userId": "144851916"
  }
}