{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x07be00df0deff5f5c3354905c35ad3bf97c9909bd3087f779faeb2901a9b513e",
    "signature": "0x7315e0da6c2ca05b415720734d12e479e1970a7e4ca29ff02f2878336c44544365e51abaa568ad4287916aeffc1f8e9032015da09d2c76eb5a15bab656aef11d1b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}