{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf9cf5ac0d69e4fac53bd01584c7909ec0e8ed0d959fb9a968be320b57ffcdd0b",
    "signature": "0x5ffef34ecb487f010790625a6b80e42d8389bc43941e0fa6af3026e6335c6dfd0844f6918dc096a27a4373f68a98212ecc9377384eef5de2fd728b587d7f60281b",
    "signer": "0x83E9E40fFBcd91584A44bbbA70a2fFA4Dc55d5D3",
    "userId": "776527610"
  }
}