{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251573195",
    "entityType": "Track",
    "nonce": "0xbb99476f28db122262931e6b526a2d4d35d3c2e1322a01b848a616e421ff9ff8",
    "signature": "0x4dd848690821808b1e0042fbcdffc61219456e50ef1e846597685914e512147b6293c8957fe8bb18753c85893c33a3087b817f8cda0c42f8a77b097f59bf078f1c",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}