{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "258708124",
    "entityType": "User",
    "nonce": "0xcf346519f6842f56050bd4b82c1de96564d6c3a4869706b7217e23d3fd4fc8f8",
    "signature": "0x2876cc8767d655d43ec445f955c19b1753ae77ce9a8b407d39402e3b5462cbcb4f0aa2f1075b50ea25e972af7419328095b72ae79a4b5cce3561313212c886501b",
    "signer": "0xe0c63F31E02C8904B91c7C3a985eB5aeC97E3CF4",
    "userId": "29864791"
  }
}