{
  "manageEntity": {
    "action": "Save",
    "entityId": "1422880728",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1734e102d8fdc24eae559b5637b691eaa2fffecbbc4a8e3fd8bf9dcc20c8aee6",
    "signature": "0x2685e1bd2625519127c1ddfcd58b2f4dc2860e01e244a100fd0b771415b4154708e7c450c2a6f2301cce572a48308a328f1a44032dbcc03a37d80f6be16991b11b",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}