{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd68faefebf3a70cb9afa86d27e70f2ee376dad1e492bf41d8a1f10dcbcd6b77e",
    "signature": "0xb73a4540f0eb182e56ace6b2fa4d4f2e7d5c3bcc803be02be82c1ba131aec49a52cbfa4d4192f02b8e998797b29d0919a3e8bd5f69dde81944feef42f9bf59571b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}