{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319704",
    "entityType": "User",
    "nonce": "0xc0502b5b57afe4cfa36e11f2bf2855d8efef60e703e9ed7d7aa6e2a61c67acdc",
    "signature": "0x034762d0fbeba3b404f56bb6ff4dc7711e88fc3e47922ecc94c46d6e8ebc0e0150c5d74e988672a62f24784b0dd7bc592f845d593b8fe5fa8ee3b88b1682d73d1c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}