{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "612948467",
    "entityType": "User",
    "nonce": "0xe650350cdd4ab7373b0363d5c7cb043ec07e25c8a8433f356f8ba3a98b1da722",
    "signature": "0xe1a50eca7b23b86f81b458fe73f13b356065b0e0e9b20bae1d4c15599af5624b496d730b5d20737d53ca55baa477f8ca7fdf84f4cc05c2da8ca9833500b0d6441c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}