{
  "manageEntity": {
    "action": "Update",
    "entityId": "857551474",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x515449704667fad9e5b85147cfddb35b07b63f79997ae91e7a14f49c7f752ec1",
    "signature": "0x16581a01cad0335a30d3786fc467774c3019f6d0b16272908eb0118fc9f8417f1d27dc29300d6deb26cae1fc5e3bf75da0c7663880114c8678a34861000c68d71c",
    "signer": "0x9de29362DF595E6949CaA2820c5c28c3D6b0CEe1",
    "userId": "857551474"
  }
}