{
  "manageEntity": {
    "action": "Update",
    "entityId": "913489735",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x215c21648180a96cbde330d1bdf52dbf6057f336bd3ecf40dba1f32a08fc15f9",
    "signature": "0xf33fc9f598ce8ffb2508cd967ecf5dd47d2b45e3c1d1515551399bd137b5e51b0ae70f9f17a0d3ba6d109358b20018e3dc6c4162bb50c48790fe05f5e4823b001b",
    "signer": "0xC4cfd63d4F836f239Dc45E79b9F9010E5F2FBa7B",
    "userId": "913489735"
  }
}