{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303669",
    "entityType": "User",
    "nonce": "0x0d87032342e3b94be2f273b81d7e06a6d596b5db0e9fd30f10e6be7b9e7b82b1",
    "signature": "0xc5e557e02cfc3bd3ca70c8fcdea5055357673ca4d7fb466d5e06726970d61fdb29c9e8b28b719d2e29528dfb927ff7169d4ea72ce800e36f9d1c9c52950ea0d91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}