{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x49ad0c5681914c5b60833293e448fb214dba8b45249bae513e3ff9bac761dc31",
    "signature": "0x2dbcc0beb5b2acb47a7b9992605cfc3b34c1fe61558cd809861f4dd90898d5af39cb657a3448a169a323e9a7a535e3d6e5eb81e96039c4136e2158904666a7ce1c",
    "signer": "0x1Dd8e503eA52eE0cE5360d0F01B587662d27d935",
    "userId": "366246970"
  }
}