{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645729610",
    "entityType": "User",
    "nonce": "0x94cc0702ad3268b24dfad7aff3b55722500b02f1458fca0b3277f96e56ae0563",
    "signature": "0xc8b4867f3ece551d965ccbb169067664ffa0d19be2b10e2fc9a4f75952e2793c3423541c761e34a80384ac8c24fbbea23d1d0365dd5204205ecc18d8f89acb301c",
    "signer": "0x1B58D273a8157400598CDDfaa79118FFbbD0810E",
    "userId": "212717491"
  }
}