{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4220",
    "entityType": "User",
    "nonce": "0x7807c1d909dab4a3cc5cbe57e1742065feec30b7c0b56562d9a4af8d94001549",
    "signature": "0x60341bc28abc8eb6bb5cace94e68c15a9d8d7f0acb700bc8a6aa6d5551d0b24701bcc53ff0edbd349f27a536f1ab44a633546e1f349adae06b6349fbf2ec82c71b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}