{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "921749721",
    "entityType": "User",
    "nonce": "0x5885cb53ba07b970c49342cce56727e013c9da07ecd8591e8e416e2617165b5a",
    "signature": "0x8d240480124217cd287f6f3002012dcdaec71385e4fa07f6b5dc415f28c136a62a2914ad3ae91ff0b86658296e01f265284059602493bbe0e412dfec4eaa7e081c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}