{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "573639218",
    "entityType": "User",
    "nonce": "0xd4f213ee0ac0a493cd181a12dd7d5a92dc2911194a685b067a42d41332b1ed90",
    "signature": "0x9298f54c246218fa4f00fbf67ebbb1b89aaafd7836a59cd9614b898840079625255fed3e73a1d6dcf255b217fe1731b5833c6a1e0dd2346c7cae072790874ec51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}