{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9213bf68fa926429d15bbd7f03f027a51e36167469a2efc8517ad0e615a8b42c",
    "signature": "0xf1064339a498d8aed2aa7bd6cfda1e03e119b9fa57100677dc3219be02df8b2a2c003a4b4768df8bc9ee1486070ff5390c5d440af325ddc0d2ff2cbe6ec26d921b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}