{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100789479",
    "entityType": "Track",
    "nonce": "0x5caee0bbf24d4ae30a355a7babde52a1840db59a3b3c0674da61fbc594e0dab7",
    "signature": "0x0507d9a8eeda479735084258b2b0eb1d80df698df6fff8777de07c96816ce4d93bd7d54d635ef4e26ab019f36eaa64919c00210a61cdabab7fe9f8c051ef34cb1c",
    "signer": "0xC1896EAF7ae2431A08647A163291b5a8A0cd2a6C",
    "userId": "185209372"
  }
}