{
  "manageEntity": {
    "action": "Save",
    "entityId": "1738942943",
    "entityType": "Track",
    "nonce": "0x8e9422189ca2e9be999ae399ab3804cd7704d9e6353cc23a6471a2dd0c1db8cd",
    "signature": "0x1de16ccaa395bb7662b3c771ad691d27ce211c98782472dbd50ff91ac4dccc80726adbb92de26a519acc4e7426708393d2c509ff07e3c5376a7ee666ef173ac01b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}