{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x54e63816ac02a49d5dba62e7f2133996e2715fcecfe42c8a995713ea745221e3",
    "signature": "0x571028453e6d6bfb34a535280d61192581c0b620fb5e9657168d0b69980458ce4d13a18b6f0b73e44440ce88fec1fbc65b474a9fdc43673545404152469de0721c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}