{
  "manageEntity": {
    "action": "Save",
    "entityId": "1469226534",
    "entityType": "Track",
    "nonce": "0x37f8884ca62b6ab9a2d9fb60b4255e91db0eac38db86564d28c3fe10a743565a",
    "signature": "0x2040e5cc630fa1c1ad9bafec8917967c0357e706ce3e8f78088766fe29d65d004a56f48020f1c68ce9acab835a422d4d2738563f6339dc44a6c51971d5255a5c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}