{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xae9e73ba8039482103b3b673e8a2ff99a94835f4ca3df937eb5130f443cb19ee",
    "signature": "0xa5910e80ace54bcd519f25acf92979b80bb7d0c2e1911d36c2cfc501dec5a7ec6950a1f15a9b5a4d2cbcba021209e09bf6acc0936ff8124dabc9b538b3c80a5b1b",
    "signer": "0x5558558B99A46049aA07f54806C03dF69467381e",
    "userId": "620750819"
  }
}