{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2fc893b85c710c2d9fbf6328562c5df01fe35bc6d2cc94e5c8485b8e9446bf23",
    "signature": "0xb844f2f535f69c732ae78e65bd62bebb3da10cbf4df3f6ab12b86271fea93c262c2cff6160ce4692e856b883e9d3f3257b31797a2c904bfd6f757c8f273b54a81b",
    "signer": "0xeFd07D389CbE01D604379435c62207952A83A4C9",
    "userId": "691195905"
  }
}