{
  "manageEntity": {
    "action": "Save",
    "entityId": "384816467",
    "entityType": "Track",
    "nonce": "0xbd480595282f0fe0712a1eef987ccdfeafc6e866ae292d9097806f3b404f7544",
    "signature": "0x6e52fb39fb6a89c33e9b16753f55801e2bf726cb9190e31814150775f7b1579a4a1447b2f47d230f59a79a104caee809bb29e46864adc76517732a4ea58adca91c",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}