{
  "manageEntity": {
    "action": "Update",
    "entityId": "406716751",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3785cdba67039d92d3563c5649fe42e7297d2272b6ede7b018d3275feed13ff4",
    "signature": "0xc906c9b967beb50b7334e20bad122c43f70f65f929a521470c20766d9c1fbe6064d7ecef6342840248a3061f202aa5c132f3c82996833302de7e4f20cc8a35fa1c",
    "signer": "0x31eba27Ca105bABB3B8590b9A71b07C6d1e7c747",
    "userId": "406716751"
  }
}