{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x035d9631d82ecfbd7d98fd5fd6c5d019591f3e348d83764b381253f9e3df0838",
    "signature": "0xdcc33d3bdf066228d340042b781c50e4ee6d8f07fbd233f1390c714950c0b6a67471e575909280bf686be57e89d9ba7a136c09890b5dd9f329640d3bbb811d1a1b",
    "signer": "0x3e2fA616B57594Ae99d013633c3Ad00E5E7Bf3de",
    "userId": "759888664"
  }
}