{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18192",
    "entityType": "User",
    "nonce": "0x821815f76b149bdd01283c20b2827f3dcd1f017b1c7427ffc6e5240e15424cc1",
    "signature": "0x40cca1af8e3cea92ea40a035bd2339cb11cea87c07bda51724d7cddfb26f8fe85f4e060ecb5fda5040d5f965a87b8837266228ff148a51a0cbbd7d590af8fdc71c",
    "signer": "0x4391C746E11181B87164C3C6DcB2EA773D749ECD",
    "userId": "729432364"
  }
}