{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "751664",
    "entityType": "User",
    "nonce": "0x1fb806aeaf22e34fb3a979abbfc108b926ec48d22064c64fdbb2d9793a8fff1a",
    "signature": "0x35f46cea2a822812e63d9e24b3d45fb23f4c643a2142a835786f303aa970e35d4571b615e17556a95ffd2c5ba31ceda3f31007c8b2a459be4f959461171e48f71c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}