{
  "manageEntity": {
    "action": "Save",
    "entityId": "1180336071",
    "entityType": "Track",
    "nonce": "0xb83c55d90950865f3d4e61706c6adedafc3ab78db00a9c09dfa3961e40442179",
    "signature": "0x5db9dd5600571072600a63626c634842d1d68c4dc2a435aefa3ee6be6dca4be463afb04245337a35470821f662f99d2741b9e40e1bf82f3756f2d74667c0226f1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}