{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x973d0fb1793a7a87aa37a880d4d54f0fc40f08668032a685e39e0d6474db0699",
    "signature": "0x424e64a883285825ab281441c39e20540edd3949c233de9d231453ddd066fb2834b1ba776d9e12d309368214c4924c1d501d2f81ba53049f95151036c6d26da81b",
    "signer": "0x5865Afd791ac0d57a0f9e8Fa840D23CF3be86932",
    "userId": "616774019"
  }
}