{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x833ca46f32840ae93baa4962a8152100de994bcddfff93d23c6b99248015c148",
    "signature": "0x21f90d75cc805c5f3b206d2a0adedf8ad102d95131a43e0c1cc6dafb4c1b691e32a508ffb73ef1b65b244972282dd033aed3a17d8cc9a89096c68948d6ac9e821c",
    "signer": "0x46CfB51Fda6B1829B8aF13F7d99133767B3F3b17",
    "userId": "467398673"
  }
}