{
  "manageEntity": {
    "action": "Save",
    "entityId": "758725866",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ae659d167252b7883a0df1e36653e5d1b3c2238c7bfa379fbbe2af8890145dd",
    "signature": "0x30c07c0cdea48ca5b50a3c7881bdcb4926b7731223f47dc563a09496c00e9e5f432013c136faca6bf728e78961c339f90f61d4d7babb28a570838cb23afcf3f01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}