{
  "manageEntity": {
    "action": "Save",
    "entityId": "1422880728",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9338077bb79ce572f1134480406942fd84fb1b84c220c722c59193422c18a720",
    "signature": "0xe073853154277f15216ccdb13e2b8598614470bd226409ba5f54f4186740e51e6ffea065f0595944515cd0e9ff359ab3e45125743e60fa7e32f626771b334adf1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}