{
  "manageEntity": {
    "action": "Update",
    "entityId": "377603534",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf5543efc57fa79410d95d787b328e6d4f9efefa5e4fd825926ddb77dd16f665d",
    "signature": "0x8ebc808c3bbcf049373e31ecd5fd6ef0239e60a631d174908975e635e398ace149b007eac5f3f1ea065b38165d850ec465dc96c09fa2b76e940c7781752770af1b",
    "signer": "0x03Bd0a309890467dba8fFDBb7156C13F50F278F7",
    "userId": "377603534"
  }
}