{
  "manageEntity": {
    "action": "Save",
    "entityId": "255279",
    "entityType": "Track",
    "nonce": "0xea5eacb477e942ec95017854a75f1ff73d6bc1f1270b401e12d30f2298f554cb",
    "signature": "0x249879326079766ecfb3b66e48424e846d6d6cfb6c5696d7729f633436cb1c4229b9fae27280779502e18b2b7d357d4b5a63c5a534d5a8b5e6d146b27642cb9f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}