{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "974540489",
    "entityType": "User",
    "nonce": "0xc2ae3923721ae72c0dd25a0525c3f7f9c9180ae13ddda360c1a58f1e380f00b1",
    "signature": "0x28013aca8677f26703f4dd0f1c05499b65c2bffd5d3c6e55f531d1515d1405f85125d80d23645833cdd0e52371ea2a4c530df979bf8d9cce359a191a70b737c71b",
    "signer": "0x5865Afd791ac0d57a0f9e8Fa840D23CF3be86932",
    "userId": "616774019"
  }
}