{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550138957",
    "entityType": "User",
    "nonce": "0x8f9e7fb4a6fa3defb4c2f5664c24f5073b804a0710044496352e29841c39df68",
    "signature": "0x38b44bf141632e85fe8ba75001d6b16b8a6a50f6928a54e213f50d1ee388d32d293458d55c344352e326ba42387c057526569641627b088291658e786781e0251c",
    "signer": "0xAE50Fa5B351784ec214251a202B5e2FAb1Dab113",
    "userId": "347546716"
  }
}