{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb16e15e2880adfa2f44bbb7183f8755e1b09c29fb0c6cab2c3b1d471657c6d96",
    "signature": "0x68af50880e028bb7905123614e7d5a55f139edcc1ccf8a010d3e7124ad9b53af08dbf636b534a6763dc4aedf38045a43cc67194c40daa546f08a863bf3b1998f1c",
    "signer": "0x6CF29C21c9C0b405C773f3605658C095Af4c28EF",
    "userId": "950485788"
  }
}