{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "759449",
    "entityType": "User",
    "nonce": "0x791e4d90fba3a91eedb5effb39a4b86271e89dc87d70b4d271c37a48d12cd60e",
    "signature": "0x96a832d6b45da576d3c5bf361155e9d05aa82493fd4edc9b5bb3611a0b3e30f8588f38e7cff6ae71b713cdabbc9cec6ce6a2ec2b3b20813d64f7281bc0b2bb4c1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}