{
  "manageEntity": {
    "action": "Save",
    "entityId": "68943400",
    "entityType": "Track",
    "nonce": "0x369f9414d72d16883465e58e990462c83419f211ddbd34decaeba36d142e0996",
    "signature": "0x4eda1aedf278b6ab47267f60f0f8343cf53bf6daa9567b2d6f6e5a2139e808bd45f42c94d41a41741f34df37fa2b730fbf1c70ef216c90af3e7308ee75a471141b",
    "signer": "0xF66719AC0E8463f8c9660B4412B4972e1dB48183",
    "userId": "57021"
  }
}