{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "490313488",
    "entityType": "User",
    "nonce": "0xeeb345c8aaea3d74d53f30a853d4507d19915d83b2182b93a9b1d973dd4de49e",
    "signature": "0x7b16699a6182c0dab728736bbe6fbdf1ddc707aa771b80c536422d4b81ec945a565e9b7ece680d5a35c50f80ea9910baaf3a1170af76b82bbf056f9fb839e5ef1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}