{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9becaff666f1d5bbd39041aa8d488a23ea2403386494d2f21ad42ccd7fa0a585",
    "signature": "0x330a8edfbda82c14355814a0e904a09662fe2ab686996bb68be5b6f3382d1d5e1b6660c000184ee92e7d389e6d71065c5015d2f22c6ae61609c50014f78b2c7d1b",
    "signer": "0x769F48DB6CC422f3d621C93B56dCe321B1d60188",
    "userId": "547759105"
  }
}