{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12953",
    "entityType": "User",
    "nonce": "0x9b4a2c7e90ef37ef37bb144c3c25c3dc84b61f4f251b3073359431d455dfadb7",
    "signature": "0xd83aeced2afd7b35ede2feaab2bd482dfc5ffbb8c94ea6c1a106cd9b9bc3a28e6de52463046823b3ef0d1a354e11c648754a9c9e624c3f8effd7f25b62eeff3c1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}