{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4dffe0241ff4bcb3d483c407388e34ee3bd6be29b01eeeba68e3ce4bd8e543c8",
    "signature": "0x53cf560b593ea80b6da28921c629e0bd5d9667aad7fa7d9f899fbd7d5aefe3d31df6d04beb757b5cf7cfff1cce354f47c5027e10b28fd30284529763c61fa1e71c",
    "signer": "0x0fdbE0966d6f65E3DE225D16D06131c10d4F2b3e",
    "userId": "560630042"
  }
}