{
  "manageEntity": {
    "action": "Save",
    "entityId": "175020485",
    "entityType": "Track",
    "nonce": "0x44d459d2463509aa1fb27d6f36dc0126f37d3cf8019777fb3833532ac4ef46a6",
    "signature": "0x7a73a77160f0bda5b6b8e16c52324ed07c8e7eb024f734a09d3ad2f027271fb071d52687b352c67ccbca9940c73fa4059c3d23d5a1f22aaf1b677037f22b2b881c",
    "signer": "0x4b8C8Bf7753B25e756D56124590F13eE023632B2",
    "userId": "138349429"
  }
}