{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "76423",
    "entityType": "User",
    "nonce": "0x121a07519906816b91d92f1dcb6328a11e7bf6f86fb3f616de707b585ff335c1",
    "signature": "0xae22492b27e3985a00de7a111d26df62c4c6a2f35c8b04c8fdba33d3cd299e83631abb906a3bf854b8e7e4e85c74e09cf3e62dfc04b5804f5f9b4ca39ec4edea1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}