{
  "manageEntity": {
    "action": "Save",
    "entityId": "984578",
    "entityType": "Track",
    "nonce": "0xea95114d492c0a859a3182355aa01d426dc53c14589e6257051ecb690795f313",
    "signature": "0x59dbfb363a1552f0e48f3df7512baf9a0304d415661cbe03eee739df4a5f0eec7ef34ee8ede3b8d11621017536a01959b3535274ecb67fe3a809e7b235bb6c871b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}