{
  "manageEntity": {
    "action": "Save",
    "entityId": "998960",
    "entityType": "Track",
    "nonce": "0x6f0eee988927676009b487942e63f40afcfb83922ecec0421097e9f2852ad893",
    "signature": "0x2ca0ea1589a785dfc6329ba1e51f1e399901c045a83e5f4f3fb681aaa8c5ab651b706e851e8fed448eed42f1b159fb9120adf0218f5a75e9154a3b49abb7536b1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}