{
  "manageEntity": {
    "action": "Save",
    "entityId": "328475727",
    "entityType": "Track",
    "nonce": "0x24bcf94dd8ad7ce1ab4e4eeb1b06aea61bbd1d768bb1bd08119d063890f0ecbd",
    "signature": "0x2d2cd5509b96c7e034e7f16228122fdea3ef9603e087ef71311c04ec42acc3762cbd5769f744cc35ab7704ce5ed434137c93efe380efca917555383fafc2f1a31c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}