{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373317",
    "entityType": "User",
    "nonce": "0x4f9944bd48401f7f7f82e6b5c35eecc7283a2c70422bb70fa1894482ed4514ce",
    "signature": "0xa504d3579bad21d0aad47ef90f8a1ef4ea64691ea7fadcb1ce0b7488eb6beb4178b77f5d75c4cc8ac7aba17976211eb9e755d06cbf17610cae7637f8a78eb3b61c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}