{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423422344",
    "entityType": "User",
    "nonce": "0x6a57c42e96c1371836f8799474af9c529d0a8556771e6d9679e5913aeadb4cf0",
    "signature": "0xa6a75e39968f08ca104293c400bd1eac41f40b211a7a4a2733df539e1779a4335f7844b4cd642088181c10dd41a070a2d64b5b0cea1756d87e08402e9fd384071b",
    "signer": "0xD0e64c13B4682813E9187F2cdDD69C18e5281865",
    "userId": "846869776"
  }
}