{
  "manageEntity": {
    "action": "Save",
    "entityId": "53565",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x89e476e7506d3a06bc577105b0193439d54782e7824a9497852cd9058add1eeb",
    "signature": "0x15564398c47483bab3e99c6ca97f90c7e97c604f399352f5e8812004c30d6a5642b69b19ae611b0d059549042954bfe765133242d6244915c145f5ecbe6437601c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}