{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "451691735",
    "entityType": "User",
    "nonce": "0xc15fca5d55acc1f605b09a758cf55d60e7aa76dff07843609a186270e9d5d043",
    "signature": "0xe4e7bb3eca91314a5e9b33a7442996a6b80870f7a7be48af972b1733b5fd52f8421b9962e4f9471b062b433dd1a8e3910a4dc0dc43fbedac39e5d96f2926cebe1c",
    "signer": "0xe64d995c4f4919f3F47574BD9Bc28505f0CD7689",
    "userId": "253160273"
  }
}