{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500620844",
    "entityType": "User",
    "nonce": "0x0247d87430d80eefbc9e170ee20ad532f9056d731579b1998ef1d96467f37c29",
    "signature": "0x969a6bf434e84b1447e879747a45640597dd1e4d06b3c3652a472973c30458b515f0b2559362cb732d677505ae773169eeb960b9777a202bb6cc20f408a225241b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}