{
  "manageEntity": {
    "action": "Save",
    "entityId": "1992645709",
    "entityType": "Track",
    "nonce": "0x4f732b90d9defba33d03269bb423ee06c2b60a0f2617f47437048713028c3b73",
    "signature": "0xf721a6a3d07824599ae8dab980b6774daadaa3c62f925e1e93dbad759c8c74bf07c9cab331fdb94da03a36078c1cf856ac000627d79d3f7984266ace55df671e1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}