{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303081",
    "entityType": "User",
    "nonce": "0x9ea01cba8ac482b573b23c910d5571a8b3966b13ff601a82d64735c79a400d68",
    "signature": "0x26a9fd68258a5f9fc6c09bd22b2fa6f43e44cdb46f57eb01b4e656853fbdc0d44884b3fa0cf3cd6400511bdeea2b6a7762da96bda06f98dcd26e827a455e4e2c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}