{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x611e7c9d2854684a95521a98fed813b1aec67668ef76d09c73b2353d9fa202a4",
    "signature": "0x63d2bbd7da3bcd3041aa0a3b98b05f2ca89b0f3450e4f5f9ee0f727a8d0fc9a6551043c3da13cbe669fda2542af940e6ed45a80c2159df77a0cd4912fdc0e5821b",
    "signer": "0xc53c7384c3863D446b037A953675523caB6f6329",
    "userId": "755824249"
  }
}