{
  "manageEntity": {
    "action": "Update",
    "entityId": "590062714",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3e0838860ea9e4f0744899c5f982b03ebbc898fd7a232d4dab17a2074539c7bd",
    "signature": "0x78da427d044e482c409f937fc36a7d0a09126f595c01a51a452d981cceaaadba4fe9a4669ad983f9ec18db5a2e59492527a34abf860ca0aabdf4253c957852a21b",
    "signer": "0xFD6ddCA27efe22c864359B250a6517CE5EeC3996",
    "userId": "590062714"
  }
}