{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xba7125500b2e61caa6f597da1b7fe004c30f1110a12261c671ff8f6d9ed45292",
    "signature": "0xcb6053165854a50f12ac634934385a3ba1d817a29fd6fd75ead5ad21041cd2944ba7884dff26c1c3c62e3b8d4bc4aedee7ca1e9dbd697a0c9edf7350279126cf1b",
    "signer": "0x1680dB3B1580049442eeb1Bf72cc293394AB00dC",
    "userId": "752109329"
  }
}