{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5147630d747f6a224bdd56731f16f1d7701c4afe9d510a1dde620a165093287a",
    "signature": "0x2716fcccbe31c39a3ed3a8cd520392c4e51e7c99d2ff22cf7af5c15cd2c5c47f56adabe440506fe5e1e909de3d987f5c4f333ae11faf1c8dc92b79500fbf899f1b",
    "signer": "0x1e4Bf6ac7487b5276f7E18B74356fE7FD5f34F55",
    "userId": "987591326"
  }
}