{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "973176890",
    "entityType": "User",
    "nonce": "0x7f870186e157fa28192ea3e65437835ae7c89f290d4ea874197a8ef85a987908",
    "signature": "0x9c2539c5a2ceb4a1f3b3e31a53b7c503224ecdf9d5ca1635b4c8c156d0edbc235919a6a5bc2127fe3fd54531cb30c361d1bfc15c53db44f30b0aacefff2db1ca1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}