{
  "manageEntity": {
    "action": "Update",
    "entityId": "539966008",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahksucbwx65h2wk6ptcq4n6clw2c3jviz2fwyxx6v426crqqgtwfq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":574881189},{\"type\":\"playlist\",\"playlist_id\":1814815576},{\"type\":\"playlist\",\"playlist_id\":107844224}]}}}",
    "nonce": "0xb9a8c0c389472223511bcf6cb9062022eb0dacd0e512ae788410f0c6195fb775",
    "signature": "0x5e3dd54f72d09712bee212807eba99d894d24b1b3915b4b6e47c44e24056f2b223dd0f84b373f71ce542e17098676d32ea650fbaabec524b22aac390f27ef7771c",
    "signer": "0xCf3010b3785c01D4D07623A089e44dd7A1Ef1cDf",
    "userId": "539966008"
  }
}