{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x19bf7a7dd00e2a105a941651d1a1e140f73befd12c8f8bd9d47a63ecadfff911",
    "signature": "0xa4e03ddcb3c9dd17545e02a45039dd136f57add78aba2af0641b4ad4588a04d863728eed43e731f5158eb7cd22015f2ff5f3885681fa8110875cb1bff88e49471c",
    "signer": "0x45e305332c701ff9F86813677d8210776F3D7258",
    "userId": "331746699"
  }
}