{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1513",
    "entityType": "User",
    "nonce": "0x477d703657c7887108bd0b58b463bd201548384e6dfe0125078697668f9ff2a3",
    "signature": "0x1da09b17ca50f04268397628b91d0a83d53266ab519da335dfa3e59882bff6eb5b1db4c4a9c3aab4243bdd6506da598893f924446ee014f5b6a49d10178833481b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}