{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540022120",
    "entityType": "User",
    "nonce": "0x79e728ba37680f54f9233b64697b810651fcfa0f7f45d8fd952a0daf3cfe7bcb",
    "signature": "0x355cf679623fd15215953541bc6379da0aa4d1849bac41aef152224ac9df65e228980f4a809053bb45874d62c1b0ec107b33a76d6c34872da9068837bb5357c81c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}