curl --request POST \
  --url https://api.neynar.com/v2/farcaster/auth_address/developer_managed/signed_key/ \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "address": "0x5a927ac639636e534b678e81768ca19e2c6280b7",
  "app_fid": 3,
  "deadline": 123,
  "signature": "0x16161933625ac90b7201625bfea0d816de0449ea1802d97a38c53eef3c9c0c424fefbc5c6fb5eabe3d4f161a36d18cda585cff7e77c677c5d34a9c87e68ede011c",
  "redirect_url": "<string>",
  "sponsor": {
    "fid": 3,
    "signature": "<string>",
    "sponsored_by_neynar": true
  }
}'

{
  "address": "0x5a927ac639636e534b678e81768ca19e2c6280b7",
  "status": "pending_approval",
  "auth_address_approval_url": "<string>",
  "fid": 3
}