{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304900",
    "entityType": "User",
    "nonce": "0x4f931b8e3a1e2ea8c3cef4646501d71af50bbad01ce2f28f5bd167437e893a5d",
    "signature": "0x14b46d8172294d62b595dc6347c13166034b6d624fef8b6053b5005c8710d8324b97b9c052f9c836e22f36429d4baf07f17b7cdbc73023566dc7bad258615fab1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}