{
  "manageEntity": {
    "action": "Save",
    "entityId": "1363800537",
    "entityType": "Track",
    "nonce": "0x8e45bc1531c821fb3c3587c5c1fe005d8618d302e80a54778e444a96cec4788f",
    "signature": "0x12dc980e6903c8200486cb830172aceaa7aa9003d15e85123c0e3b2945c6039755b13792945dab4830cf290db02577fedb0563270a53a4ac28ded1787ab880de1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}