{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0x77cb75677760ecd866a2d20a1b7bb6512c91863d23e3de304e9387cc8288c772",
    "signature": "0xf5400979726ad153a02c01a9e99533d4286494d64094aa36d390ea4ac3efd5a0373c0e592c4270b61f515c1f08c481373344c6a5bcd0bf5aa60683b6b67e10531c",
    "signer": "0x3CEbf9bfE1b24355cBC348701860d601E226Dfbb",
    "userId": "172240066"
  }
}