{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x80c69330818d4318adc6139cfca589ce1cbcad93b3626b2c33606914eba3c7a6",
    "signature": "0x00bb7cf5694f396feb3e8a1e323b83416164abc4dcac71d0db95040782d61ff30f9139695e0b4b6782c2de2dd055c66d69b05f916b36bcbe08c8871ca0f2194e1b",
    "signer": "0xa53b93A102988fa29b683eB73e428dF91bC78cf9",
    "userId": "87057210"
  }
}