{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1903304",
    "entityType": "User",
    "nonce": "0x952f9b3df91e38de67e2b86d68e78b5913636b8e3856c2b9b3895f281f66d5e4",
    "signature": "0xdf446fe888e6e0810599cb420d9b0129fed155eea5bab8f20246566718e61f0c1d8cb3559edc8a818c77dfc3f32a63f55be51a7c4dbb1b7255e1e6d154e5084a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}