{
  "manageEntity": {
    "action": "Save",
    "entityId": "54045213",
    "entityType": "Track",
    "nonce": "0x7c142c0a2c1b5383e078309fe3d6868f7101bc42c5be9a4567fc0490f589d5a2",
    "signature": "0x64ec3d9fd74a18a7c8c1c67e4f87670f2dedca3875581b0465dfadfd2168902a7f2df39265877ca96fe02afa0a0b7c1818fb983102eee591e3eaf4fe4832bb011c",
    "signer": "0x8097f7562D3D2F9cbdBA391c45c0D376E438625d",
    "userId": "51978829"
  }
}