{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc58b3d2065b96e5b6f706a74b617f227389993f0e273ba6448710184d43ffb55",
    "signature": "0xb49f898e30eb4e0a444d90b4cd974079f94c17b0f31be1300f46a43f451c63940594c837b493756e48431cfcc42ada7a2717144db29226b4b6540548f44ba9461b",
    "signer": "0x6ADF8527e00EE527aFA947B6Ad0b548b51592cAB",
    "userId": "581347276"
  }
}