{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515821762",
    "entityType": "User",
    "nonce": "0x0e40ffc28c97cabe4148e12574c4731cb8715fdaa22d3071055b0e9b242c8215",
    "signature": "0xcc64d2f9854b6089296eb9304cd783d9251c46d1854b17d24ef9126f1948e9035fcbebcda26e2c3cc9f86d65f449fb337a4fa8b14dfa65c9bb7aea251b2dbe4c1b",
    "signer": "0xE726D55D6940a70995Ce9D8aa1aCE76FC6f4f544",
    "userId": "285113781"
  }
}