{
  "manageEntity": {
    "action": "Save",
    "entityId": "746941635",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x44e915af2448d1bf58868a0ca5c91ddcb7669eb1b5d283f086678a7542842a9f",
    "signature": "0x73d54b7853a91817a4a3ec95ba00e8baffa192d1e1b27b5fca4c5398551f33f919c168515d8aef6e8f42b5b0a233cbf5065e6a3f2174876218aaa371d402e2121c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}