{
  "manageEntity": {
    "action": "Save",
    "entityId": "1799293868",
    "entityType": "Track",
    "nonce": "0xf4c345356b1397a3e1ae0fb42cca10e69976c864f5d8f5da4ba539e6e083fe4b",
    "signature": "0xb9f5947f5c72f1c8548174c6badc657fdab16ed75af550b7a741a1847edf375a78068c311ffe8505805341d0668625241cc1f309e8cf207e7b55d5b43f42f68b1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}