{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "509794524",
    "entityType": "User",
    "nonce": "0xbe0864e9e5285b0ec43811b57d020a2246aec19c9709250222073ef7847abb06",
    "signature": "0x5983e4d3390560ea05c589854d1127ce169e550ceb151e1b1ccc6b5614a5bfc309dc532cb819d102c7e5022f409c65befbbf4c6fb3261de547d3821d0b3050c01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}