{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900066767",
    "entityType": "User",
    "nonce": "0xccd14820c89022c65de3fc12d7a5d1899431cd0d4214c7fc2d7bc3dfae311bc3",
    "signature": "0x0c77683432450d144a16418c78ed38b4b1f99a976a76a5562154d2a4d3b5133e0416d0067650f5120c91ba5a990563053ea0eec84d28bbe972ae2aacd956dc071c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}