{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x136e66542413eb2b2a237b8438e89eab230b6835c0104a5530e1b1795959947f",
    "signature": "0xd1d5b58a44850f7f6833d67251a7f214df060749ef93518dee7c7d365294f8fd55782b8da852a9a770deab5c064cf7f7e55f28c80e27a148d7bcfc3dc8d1ff701c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}