{
  "manageEntity": {
    "action": "Save",
    "entityId": "450190671",
    "entityType": "Track",
    "nonce": "0x9d03c8dc02ef4722346eea2912a6fe2dbc0f64c1b4ddf56a8674301e0b24de76",
    "signature": "0x55cdeb57b2f4fea98e184841720c03a2bb5b0cc17dc559448322894b81827b920cdd6bba23f2604623d327789ebb1dd915c6229d2f3dc719ae816097373b75f21b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}