{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "724440",
    "entityType": "User",
    "nonce": "0x16823bad7131fb94cf79d8e54f3ba461567f2de436b22413bbf53fc11880ccd8",
    "signature": "0xab58a37747805aa10a26b32c66a8d57a8dfcf16809fcbbaeef3d9548cfae9bfb4bdec7c74a7614a292400ca371cedd292e03ab6c5c2c4608cc38020b97ae6a1c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}