{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe5ff8924d2a057f4a88e0cb73a6e8896668eb68c894ce54322584a303f3c4636",
    "signature": "0x280aeb06bdc0b92613a309911e3e5756df284bc65b9d0b10ac3478d05bb1a64d4561e13675cbe47c9d86902306fbde47794a57e05b665102ef9e4320ce9fc9231b",
    "signer": "0x10A676761D15b264dd4129304dEbb659a6522Cc2",
    "userId": "759056113"
  }
}