{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304402",
    "entityType": "User",
    "nonce": "0x2f56bc7d01525e21b32c645c878e86b39f561a2c26f995d664078ecc001879d6",
    "signature": "0x155fe06e904b86270021a8d808763e969b4119e09bfe2607a0e2cc72290f115d2015392054ceeda2be93ab518bdbc2bf6c64891a87400fead0db575b65d1abed1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}