{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5aeae8d4e70ee7ff743af43903f36cb7e8f1b2c9bb17c68b1939c423a36c6db",
    "signature": "0xba512fe2b21c61079b3d5794d70da35005bb706039e549d0bb97557b6543a56e54bb7eaf7c3e23b3fd4e860cd75397f93a961acd1217084473822b86093ab5971b",
    "signer": "0xbC6F2a03a7eF7517ed79dEA4d42b300BBa79f793",
    "userId": "515207100"
  }
}