{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb0cf1ae58a53626c5de34afa977fa73a63bf40e2e0c3dca169b9b8a3d38498f6",
    "signature": "0x70f1d18decba401f05f13387935d71f8128450efb4b77b2f759f0fc1425b474721564d59e1a0386aad4973ce93a61450c136f2bdfd93ccf0935bd6e97e0d0c391b",
    "signer": "0x4d34Fc320feee67A4EB4002312C2FC6eFdC123F1",
    "userId": "268553548"
  }
}