{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x4e3b298360ddfcc218c6f763565e92136dde428ba09f870925c1d56f8140e9d4",
    "signature": "0x3f980993cd4a360cf57792b5df58d622bb196e813620f8dfe637641f6a4bcedd523147b544f60fb998c1f4deec5dad48c11dce018548b1b80368d755c0b7df2b1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}