{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x8d79f88bfd25bbde0395d0ceb2ecf98afc27dd9a30e67e9ce2b8038a54360e36",
    "signature": "0xc27ef7b82e291abadf07c18de53d28a0da436e282a6369d67c809447b2d6823a770f18e1a6f7b86b893e2d9bfe740e73f8d6eec449123e2be0d996de85e81c651c",
    "signer": "0x2894556dFf754e2CC414d20911061EED921C0C75",
    "userId": "426912480"
  }
}