{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "840551112",
    "entityType": "User",
    "nonce": "0x77a86f42c500b77e76cba496edcd226a42370c8e0f89bc6c33f4d877d8ac7f24",
    "signature": "0x1b0837943a0dcbdcc2b6945c7ec95c3734e927def454730e56b87f2e35852afc0c91fb90010bef39f62228c7dd026ee6e8159ca165896992bf2fd0083958b03f1c",
    "signer": "0xf60d97565ebBCa309e6202BD7110e5EC3dBE9323",
    "userId": "548235328"
  }
}