{
  "manageEntity": {
    "action": "Update",
    "entityId": "450917397",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7ff06c3962bd22a912fab863525b56fdb24a337220df806b55e3b37abe4f86d7",
    "signature": "0x29e9c0057c5a03aecfe55ca9729524f5a12304d4a520f270f2831f9160879bb906edb587fadded173aa769196c60586a8c7f8edb4d558ec3d94837297d1d1b1d1c",
    "signer": "0xa716EE6aE1fcAF06103c738DEC715D52277f96DF",
    "userId": "450917397"
  }
}