{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "649308118",
    "entityType": "User",
    "nonce": "0x9591ccfc8886c7f49326eb5a0b8d2158927a36ad9c3b5e2caca3b954b0f5e32e",
    "signature": "0x68047bc2069d546c1e8d1803cda9c10ea1fdbaaee51ba9935097e148695e9fa4690ec26c1d8689ec680725da507fd6fadd51d0b61456ddcf908b0e73b230ff231b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}