{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9c49dd583bf5ac58c3fb1de3b2d5c85f883e6761fcf527be27b7f2a195eb02e3",
    "signature": "0x68cf7d6a985b0157785545da7722b2cacee9f6470a98b2960f9c2871911301a101d1df86ee06bd943bd9bfaaffd104c82ef4bc664210542d53d44be55d71eccc1b",
    "signer": "0xA8e52aFd8802350BDa4e4B5a2381A2B9CE419652",
    "userId": "983122516"
  }
}