{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x08f1995de7c32656bc2fb75e191fc2e6b46c4e36f01740a5d66466047a492aca",
    "signature": "0x94e580ab9c767cbcbf624c953cad4d22473af2a411f653f4b5be969fa2a9fd0b356b266214965fdfdce5c4aae713cc903e39e8885310b338f0932ba81c6a40331c",
    "signer": "0x335270a3a4F8DCEbD59f821af135D4F6c3BAb15f",
    "userId": "255122369"
  }
}