{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15600",
    "entityType": "User",
    "nonce": "0xa1a07c2be7b11adeaf70e1402eca1b638d8f2ff6b4a4c9280be9fc0a6040a2a6",
    "signature": "0xc72735f2a4350c592e0359ba9e93abb07fbd0448c0667a90054102686a19bf871d066b3dc0567883fe5d8d5af98a5e8d6b9ef6367a21b215340eaf1b848a28501c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}