{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1408740",
    "entityType": "User",
    "nonce": "0x880fa02e564ed61ab1eb093dfcf8e723477d07ee1fcb7c112dbd635de5466fac",
    "signature": "0x7abae4f69397f81ee10d64c4b1ba59b474ddf2d60072bf3bfa47802c54140659376d2bceb437fa75247811ee59d4de763b416ef3c3ceff961629596db48c82721b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}