{
  "manageEntity": {
    "action": "Update",
    "entityId": "216819909",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xac5e938eba95342af19925c3f67e95c395accda83399df5f7699800872789a2b",
    "signature": "0x729467ce6d544ce724877cd5b1245152a2ac198e3b47ff496e92198c272e4efe5ad60d3c852f6c5a3c121a16d8e0a8fa594a5a7d4461eb021794d50d6bf9dcc81c",
    "signer": "0xAF99D345695fc8753ee50ef8c9606a52BAbcfCEa",
    "userId": "216819909"
  }
}