{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123395122",
    "entityType": "User",
    "nonce": "0x7554536c78813d0b0ea1b052ca46ad79fa4cc364854f18cb98f6128e4e137007",
    "signature": "0x6f5eb7c18724191a81ec916799c7414ef67ec3a26d1bc17b8cf21f9ca79957cd7c98fd0f3e37d38601424dab400b55bc50a3c37d26a18025011540e04e8922581c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}