{
  "manageEntity": {
    "action": "Save",
    "entityId": "215340519",
    "entityType": "Track",
    "nonce": "0xeb0b17e2916a34e780fa2d3c6b7d38dd9b6abfffc7e6166444b03eb22a70f555",
    "signature": "0x3cf79b912e65b16acc6b05b9ebb59162856c0edf19c26573ff13d5c26a9a0b7767ce339b6251b53d9e1f4c9bf5bb005c9056d6cfc653303b317f1faf2adc73341b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}