{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6dbcf78e48cfc7721db4b09765d3f1dbe27eccf4f3f0613802916f05879a44a2",
    "signature": "0xe34b552565f4f98e074f8c30c34f858f06316cafc42ffb532abf85c5efeeb715069e694f1ed830cb027aa68acc5cad28bb0ff21c0989266b6e8e2b578a7b1a1e1c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}