{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681866568",
    "entityType": "User",
    "nonce": "0xc0e7630294fe47fff0f72c2d04e5d0bd813d2f5e4eeca3a8adfd99e2d9e0adce",
    "signature": "0x29f09efa123953c26830c419a35bd1eb67d469add0489d15ccd1a6f2ee1d2b800d24f9c194f850540b43d81dfbb3fc5e3ede491f0a605cbff9de21b05a2c06181c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}