{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0x9129ed6e7c18a193a11e70103f3a7d371755b630171a9996f301d9868609de5d",
    "signature": "0x10e503b12f793ef28c3e2d175e2e2e730785a4b05d862ee6692afd04afc023a64e5d44779a8beaa40727f2da0e81bcba028f985021371129580c993e837ee4e21b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}