{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc3688756ba6fe160998e6d9571a6df42364eb2ef9223333c495c82d89a2c2ae4",
    "signature": "0xa2cb4b2149a258b541bf607131fd544276e5c5687a95a933791ffb2c5a64eb0d3a6d5fc6de7a0347309955dd194f5a54f6d9bdea17875fc9efcca8dd8dcab6c51b",
    "signer": "0x258a4Cb700805319F50300ebba72383320582E5D",
    "userId": "737395461"
  }
}