{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990296300",
    "entityType": "User",
    "nonce": "0xc2a84638f8db82535aedd298338435722976bfbd87e6f0429ec7424c4d680559",
    "signature": "0xbf32d8ecb266655f4799ddcad9be5a5acbd74181b4080584786b2209d7108eda2f0f7317730d883d220f6b1e177cb1b2e0fe7d5a4e5acfc6b083a60bf9b5f6441b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}