{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640375784",
    "entityType": "User",
    "nonce": "0x23b994489beaf5845d393bf4f17e20a2719bcdb57b3e6e22fc64da16090247e0",
    "signature": "0xe883cf9e04482e439739820e2cda5ecef20ece1b9d386832d4ea065ef58c4dd7169c20822037c1912159cd279c06fe203d28b7bf85cc97942eea0c2f9f997f031c",
    "signer": "0x6965Aa9ec89F0ab44c5241159D2188d7b83c1D25",
    "userId": "278763919"
  }
}