{
  "manageEntity": {
    "action": "Update",
    "entityId": "599428901",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapc7fwaxkc7e5nbs2czoeqju522b3qd55zrobume7nvrkalgv2vyq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":197709728}]}}}",
    "nonce": "0x05a823ed2c0113f44abc5e7b2e7a5cd47ed4636e1c4b83478f2e23f6f27cea78",
    "signature": "0xc94470f8e931455f3d9b5cdc83a337844fce83c8b56991d28da7bc678744fcb5101648277533e56b1a023e937e8ef122b153a8e5a86e3e833284dc5f7250ddaf1b",
    "signer": "0x2e16aEAD8DD93b4dB416EC8F6737547E2D945574",
    "userId": "599428901"
  }
}