{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123348",
    "entityType": "User",
    "nonce": "0x3928540ef34110e346037cefa41c2ac6357a4ecdf796087db47d8cb2ac596f0a",
    "signature": "0x10e6401553a9ac44dc999ff64f146bc391ce8ca8543a337c2521fcf5acd5d92b2bba8f93fae09a1948d3c461195c0e9fa3fd57cf893609371627ce37105dd7001c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}