{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121439",
    "entityType": "User",
    "nonce": "0x1a3518b4a096bf5129b920e4a52b811aad410df5f276280527473bc1a54061f2",
    "signature": "0xeb2bde92517c725e589a11b1a1b27086883bbfa7f2b55c5500ffc34a106c2a6a7b96a574dd418e64d606c70ebb3f66db43921d96476ebe7acc708b7183347df91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}