{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xcb0e1ac6bf3fd73672b6402308f6a2adc41c7ebece6723e1056aa793e24daecb",
    "signature": "0xcfd0f2927cbf86f95fe1578ffa2da301a014cb441106a92a19c33ed527e0d6bc74a7c1c13cf0d0fa593f07e5f2856d3c3c9d25658ea06e0ac54ff01690be2f061c",
    "signer": "0x8838cB510ADd37b71093e4FD76B81bdd280860f8",
    "userId": "674339889"
  }
}