{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1bafc0c77b9242abe1bcd1daf26664f44217f955f0dca383ef33d6af886a4b19",
    "signature": "0xf3cbcd7afcfa77ca5838f387bda7d1206a2973b0c6588f4e331b83234f1a0d8569ac64502081f68a033d282e77eb2fbf27ff481c731597273b3633ef115c5d0b1b",
    "signer": "0xd3290A78b21ED4624C85FCdB275566725628d03B",
    "userId": "223369829"
  }
}