{
  "manageEntity": {
    "action": "Save",
    "entityId": "855092402",
    "entityType": "Track",
    "nonce": "0xcb8eb6ce2301640d5940a9c4d17903c2741c0e8848610a7a206372efea8b422d",
    "signature": "0x91f86fa80808cf7258bca7e3404416963b94966ba64630829aed6b895ce74ff2342eb45f55a414044d7a2700cc8bfc5f9b2478bb70cff211f48cd6b64f46c8f11c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}