{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeea4e75db1b2d793afc3c7f8083cf8972bb3d54dcb5496dd7a5f4e3f1b545eb3",
    "signature": "0x5f3960509b73fa24666323e92c7b5090f2bce694a57a9a039dd301d2b4dc489c6abe9e901eda4d897703174a1f52e7f6662e145437dc3496683e9f258f1e60191c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}