{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa87258196979d78958205f7fa82cb322f0d4b17d3f9eb3e979e6126ffa3309dc",
    "signature": "0x671aa20cd2912e15e921ca4c502f3dae6e06e114fa32ab496a9e1f2c0a0f43081b3ef209373fc77cfa5065ae41474484fa30e87d8701c8d5bb60fc4da9080f231c",
    "signer": "0x0fD53675296Ba254e21d269e6331Dd9098ACC40b",
    "userId": "952554685"
  }
}