{
  "manageEntity": {
    "action": "Save",
    "entityId": "1221742429",
    "entityType": "Track",
    "nonce": "0xb92ab22041f42a20007e10e953027f6862732f8736c12cb1a06438655f563532",
    "signature": "0xa5c0feca35a7a0b26ecb30fce3e139896392a920763b47ae3a99aab7c4af4b263056fba8ba6d80e3bb1a36500aab1502b6257dfdf5031b284dcc51250cae2dd91b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}