{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0x01ce07e0fb0d75d3ad809d93824e93d5605dd821275f2b1980e589bc3e39b9a1",
    "signature": "0x3cde941768eb6ac28d506990aacd54cc121bf86ae3c7d851476f24b362bcb65769e4b0de0ba79ac15f451caccdc6cf31f9da0e83547e10ae0dc188344979f2d01b",
    "signer": "0xf4e39f23021D832A7D8e37A3e280Bb0E5bC75bFC",
    "userId": "406892069"
  }
}