{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x66e472d5a5467a2a95697a35a9580adad7dd9387a69fa7940087ab0cfef3c1fa",
    "signature": "0x22e45ea9175c69f344e25af909fd7dd73475679513bf07d598d95b8b23ee5fd67a1613bd96cdc54c71ecca9ddcf62598cdc3d3ba98fd89adbd83aeade7c61c011b",
    "signer": "0x3ce98eEb540e9f90ae2BB6588CEc86ABa4099408",
    "userId": "8601343"
  }
}