{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x49bdff0a5e687505204d49d6f9216f51c4f2e896c541524fa4dca9a33baba90e",
    "signature": "0xf944807361ab8baf4011d9a78ad5a4bd400eb9e760af7be3a5b1543153efed3a22862bd8317a150fb27f4d21da6b99e3b21b0c67d3581eab4f681cc2e6e80e4e1b",
    "signer": "0x141Aa811b9C24fAB768B4D3Bd4440c6502F16b64",
    "userId": "152746608"
  }
}