{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "789767385",
    "entityType": "User",
    "nonce": "0xdb8619b4bc1b987a403f047843585f4311e54bb0e5ba2939e596b0b98b5dc1e3",
    "signature": "0xe041eb6d3271d5948973b1a0dae762064d8f0d54b927a44dffd9ee4fa2d2f82a7d202c4502973b4771e3a3dd770b1587c9e0f998b01a0e53a6d2abca5cb3f14b1c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}