{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x83763dfdcaef2efa08ae60a1a5836341fc0d0f3d826460eb5059fe6e4fd5507b",
    "signature": "0x4e8533cb17f0915ce0eaaf114ad38563e01803230c78af09e17aadf36aa1f2d71f549201555cb01c8b8af2e64238adf362b1a2207b3f036f3541e960c3da5e0c1b",
    "signer": "0xe1AB4ecb0F95b5ea275f6E67861966712A9F065D",
    "userId": "801764342"
  }
}