{
  "manageEntity": {
    "action": "Save",
    "entityId": "1135707",
    "entityType": "Track",
    "nonce": "0xfd6251f8a0e6bcb723a38441ba14c31fb98d8b3aab88249ab2f6ec72243e2e8e",
    "signature": "0x9704f21fe35e9bd4c6ce9dec092471e50d302d028cadb1c595cce3e88658d8a25fc6ae0e67a2cca793ebff3de7f5bc4aa6925b334d1b58298cb193e48331a2611b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}