{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1604",
    "entityType": "User",
    "nonce": "0x7edac44384c9e72dd10e31c8150863a13c4e6e040908f598e1ab03a623e43ede",
    "signature": "0xa9ddd648c4d7ba3cefe0602460c01aa77166d5af95841222f52be4f0ce45fbeb5125adece54692f7bbe7b1c4741bf8e974daf715723a4b616371e7fd1d5b6c291b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}