{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x3fa6ae9a79221a76af82beb7fdcf3d97b1101bff5757b3da36d63c6017995868",
    "signature": "0xd355109add8ed805e525f0ac2372a96425454fbf9aefc587d8ee3e64a6c94bb80f988889fa3b93821f39b12da3bd008e98e57ae2d4fbb1b7cfd1660c271ce58b1c",
    "signer": "0x862060c02F28f6984692E1Ab0f15419eFdc91D0A",
    "userId": "321032997"
  }
}