{
  "manageEntity": {
    "action": "Save",
    "entityId": "757104",
    "entityType": "Track",
    "nonce": "0x2a890a2213b745ac71189f7f542185bf6547c71804a42b5ec349644ee2909940",
    "signature": "0xd45330e70114a0f422a9644b61289ff948f6a350d57d9b19a661ecf9326437c07989eabc9f7bbdf1060eaeff04a5979ad9a07a7fb2c94125d32360df5839a72d1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}