{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "630656121",
    "entityType": "User",
    "nonce": "0x1be221f985e59af2c3d93af4c789cb556d51031c89564ad821471979aa8c9fde",
    "signature": "0x4d850f4def3fc05355d64226e46bcb1561d4671a7bf6a8ef9d6c86dc5781cb9c79f0457e70bafd07ceb22b988ff09c06104785ac469666d4e45783a0647c1dd41b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}