{
  "manageEntity": {
    "action": "Update",
    "entityId": "508931608",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5b7514cbca22bf8ecaa2ded20719df1855c91f91944f9e118c45e90e9fede0a2",
    "signature": "0x1601387f13d68fe3d1369bcb880fb2a25ebd4e99aea9b6ff8a6e3c18e1d2f7971ec26d08f2f18e1a5e27a3b255bfc2c23c1810bd9c8f653c81be3c997ec912491b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}