{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7093dde63e09b6743a14b56ea547eac0b2c0378c026d8e180a798e337b5a0270",
    "signature": "0xe0ca2d6e02d25faac3fe114cd6c8fc34b75e66fe4b1db0842849696c23f1f74824777533d7f49f669590c9d65bea40b128a3dfe3a0aa88b3d2250f8017ebd01c1c",
    "signer": "0x90cDb032c8C60DF3D1f728A10c34cdC0E3f5dE9d",
    "userId": "422677550"
  }
}