{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x02c0a62191cf2753f951c31c0f7423db7938d1709167f0ab22aac6cfe1270232",
    "signature": "0xd356ab91ce63c3d7131cde850047e322a55d6f1757cfa8446e49642a20e0ebe86d015871a6244b3d2878a938770cc605bc9503d440b21c013c3919e48823bb701b",
    "signer": "0xa28e001D31E2ccC4f8FE32aa84089fbeD3D28eBc",
    "userId": "264735382"
  }
}