{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x47079299ae92fc0136cbd24e876e461cc8234dc7fa897a9f80345f777e3df70b",
    "signature": "0x63986652cdec1df55f44896db5bc4d46f42617bb5abaca388cee85a33650c25130f55648f562b4acd12485ea8d2ba09b3ef19827b746bf4c285716686a8773251b",
    "signer": "0x1493F6883DDc36086273F3eD2c8F1C8E0Bb4f571",
    "userId": "321591746"
  }
}