{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x07a237d5a1ba56f476b20c7e5f7f9837b44702cdea46b2a9e9aa17fa50dcb1d5",
    "signature": "0x404e174f31747a58e72ec6a4a54f266587582d65ac289bbf797ec4e15270487b2b1822552903015c2f1903dc5ff080f3bbdd164689154837c51ce5e266152c771c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}