{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "820486414",
    "entityType": "User",
    "nonce": "0x9f83c4d29539e0d39d660284980765fea8c215b00d933c79f7f7ccd5b77d0ac8",
    "signature": "0x22dcbcb4756d463c5fac3863e0e38a1f5ed2c52fa94628ee9cca691a8a86ba340dcab09db90cc0ee248819a3e08b00f3d1579d2c9e1363294b80a876fb9d96631c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}