{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ad4c95680093a8990cf95bc7dd5507eb40a88714002e05f14b6f9b392e4d02c",
    "signature": "0x6abc21ac98469cddfd65ed5b0e254bd438a636d05f647d3273e318bf9ddfc9cf2cd96df9902a8f5c4972589e9164a7da695803b495ad7203628eb0510b0ceddf1c",
    "signer": "0x6F2d3eB2e9C70B33fCbCFFfA0c23fF7bC7c23DE8",
    "userId": "758052743"
  }
}