{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0xe4babd2e684ee9439ca3d59b655b59a73f412180bf2e4e9ff22f7b50d3f16d4c",
    "signature": "0x8e0db3f58baa8a61040631cd16098eb38d83e52eb5e277f16e9e4ba3000624c758707e38d8d490eae1b319d0060928b07da83552900f25f48b3d31404d5676d01b",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}