{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423",
    "entityType": "User",
    "nonce": "0x78a1931ac37d9438f50c0e92225843bddaedf4b19b1d64671771ccfa9cda938f",
    "signature": "0xdb6a07648a69d726879b668fea5fae4990d539f7296f303d6d0fcedff3b2b4220031b4b0153948a4e5e2e1057fdf7bcc3a0b996430cbc4c9778ecbae529ee5b01b",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}