{
  "manageEntity": {
    "action": "Create",
    "entityId": "1603503016",
    "entityType": "Playlist",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"Made with Audius A/B\",\"is_private\":true,\"playlist_contents\":[{\"timestamp\":1775806505,\"track_id\":1464837538},{\"timestamp\":1775806505,\"track_id\":1208825216}],\"playlist_name\":\"A/B Test\"}}",
    "nonce": "1775806505845028165",
    "signature": "0x54100fb8cb51f239cfcad33d58fcaa130116e218192c98940b92c26f791671515369f2f8226818ec6a83119894a5c3db8951f0d4bed0a31e3e7bf76bd19b4aa31c",
    "signer": "0x43e766989e99A80eCF18BF165011e01fbFC3A676",
    "userId": "319129"
  }
}