{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xabc21858d6207d8582a7882b0265707d4b2c0230c41cd4b2b689e93b05fd5ae8",
    "signature": "0xc416b30524a0921761c3eacc646000eb8cc90a95fea1c3f186c0675b06d2b3d23ca1780b2d3cba79a23819d5d588b4edc9110b22797ae4fdb8a7d571ada885071c",
    "signer": "0xa1962F596d0c21815F786Be31Cce30330233Cd5a",
    "userId": "653470626"
  }
}