{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990670901",
    "entityType": "User",
    "nonce": "0x3c05db82a1f5de4d906f0ae1276bbfc56036b89597ccf16fb88ad0c4bb1693cd",
    "signature": "0xb72cbe174907516f698a1acffbbc116cf771071c4d1b20fb763a91786a8c1fda140f7c1cafbeff270940724433a945fc7880ed79e7c115d1364898fa975b693f1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}