{
  "manageEntity": {
    "action": "Update",
    "entityId": "600271239",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc52cb81a96395bc81b5a3692e758a1acc3934cfa61fb24e21ce866d1ba5ffbdd",
    "signature": "0x5d5f21eb7bf2a8897f0db1a42303a625d4a9759f834ac0602a2dc53f1717de1c50de100cb8b4211859b411333b8b02ef6dbb8364a1644d070bdb562e2820ff691c",
    "signer": "0x8fec59DCE6F267e709279E48f7Fd14d6A6f1dBCC",
    "userId": "600271239"
  }
}