{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "531750816",
    "entityType": "User",
    "nonce": "0xeb9bcf2420b972f7ec2b9272a75134c85a79b8cd25e14093f5447b3005079b8e",
    "signature": "0xa025aba07283a75472a008e8415324dab3ebc19c69120fac592db4480789443d09fd40995334600af0656eee0541aa10182bd23aa6a36633790f1cea8d19f0741c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}