{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "9507",
    "entityType": "User",
    "nonce": "0x2adafcc660f419fbf80933d219d3ec0f5431f656c4b2f333a52b25f618e0893a",
    "signature": "0xb1a1b6a6fc90a6a8cdef00ff8f5a140c1a270572d43f08b7fe27cc848035ce7d328505ef016e4054494bde2e58787adbe8e50c22c835e892801ceaa3d18988171c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}