{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077747",
    "entityType": "Track",
    "nonce": "0x9e95d7e0609377bb88c40740609f034b7213a493793dcb02e6a886565a3f3d7c",
    "signature": "0xe7a62d0846366cda705a8146a207331d4305a837fc18fc3cbd9c78cbd182c7467d1d934fdab0c86b8d6d459d9e572db8bf78a0726ee01646098a2a2d2d7d43ec1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}