{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "13721",
    "entityType": "User",
    "nonce": "0x3c8fb499dfaf53590c9e64f20c624a637774699bfe46d9638b1c87e1cb4fe706",
    "signature": "0x3dcfb8ad0db01b91d46d3fa7b642349be89d3501543909a5c23529f612986f190cf766d3c76d5f92c277a4ddca5108ffdf20e638619416fd0c3c21a82752016c1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}