{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x1d408dca506ec62b67a6ce66258c88d2c83b4ab60146c848853b29abcfcadbfa",
    "signature": "0x5be061b2662838fdf72b947db61430d7457b3f5c2ac148c16f84d4fb7504305c02ef5e20a390c8b98565df44865ef4042f9ac5aa9d1ee4c1f5adb612f77f7ff41b",
    "signer": "0x7662cb86A5Ab2f46DF58d87368873d0f07FbC1Ca",
    "userId": "875856435"
  }
}