{
  "manageEntity": {
    "action": "Save",
    "entityId": "171364724",
    "entityType": "Track",
    "nonce": "0x91a8498359b2212702d90519f4e963b4387a43897026688f1f98b6532ce3e1ca",
    "signature": "0x25312a0d9abb151ef31d6134fde197d9638d02959020abaa933c8701be35b79752757cf2b9d3a2ae821475a99843d9e27a0ab6ad2ea0557c08044c6598be73d71b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}