{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2d3229ea4ad21f57720a07a55f95c437c3409777358373dfc55e45eeb1512e4c",
    "signature": "0xf2eaf770646a52b95de4d2137e91091c2ed7998d8db2e516ec7c0914eba065c91df9fdbfb6ab81c5538c0790c30d5076e29bce557794ada8ecbbdfe657ad910d1b",
    "signer": "0xD0b2Eb9b9b524f6152055A9e9ceDd88E7714Ad5d",
    "userId": "687305535"
  }
}