{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512421",
    "entityType": "User",
    "nonce": "0x1aad73755b514dfcbf24415e3d8c02011e498361be767935f03b83bd860566b8",
    "signature": "0x079e9d051047643a35101c26d0e6f7ebecf9437df8b8337f1b0cb5d68535116858dd40db9bfe7e7904a0414865c116ed2c2e5f7da9a6d2a8553d8d4c892a80311b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}