{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399726512",
    "entityType": "User",
    "nonce": "0xc6471713c8b42d9b0927ae9d1f493ed3093d648107b5271745b09c41d20ddf02",
    "signature": "0xade829b5ba55a4600bfafa33ce9b0cc4a255d7cec04da5e440eb0b5dfe7fcabb40db151aa723a7f5f85dd0dc83a0ccabc03683a4fccc23b7fecab570c8201ff01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}