{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe3eec000cc965412470589c2c753561bb0da160dfc1585e43b6c9ab09fb2f25b",
    "signature": "0xad21203a34aaf8690cbe9727373998fc5ac44e487bc35552fe22a6ad540212c10363224d11a11cb05a7e7ef8a65ba0f0e0b19cb82f950fef1f9e75f4c54434a81c",
    "signer": "0xD587D3c256295f1e91f0B0533D3E7B1DFB82FB72",
    "userId": "647025665"
  }
}