{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xfb13bb5c0884e49a861fc0f018d23526e573ecee9f64aaeaf9d7cee2124e1fde",
    "signature": "0x9dd76923c3ec9bdedfe3f436fd0bf64743261d32312892473e77c19624db3cce464901cf3c5ac089df14c230feb3ea0326b70e4fd55ee960a0d0bcea27e5790b1b",
    "signer": "0xf6eca2c1CDE9e52553c4636a5999b354714F0493",
    "userId": "574972460"
  }
}