{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0x66f1867d06ac4c55b9b7ca950739544130f55ed5e1382d46e6ae22df8eef0d8c",
    "signature": "0x4574420f4ac2f8a2d84f156c7a2058b5243cbce2749f91ebe02ec84185e3ce621c827aa77b0e86bef533c9b67fcad1e45d008dc9f984f8f0dbfcdbe1cddc1b421c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}