{
  "manageEntity": {
    "action": "Save",
    "entityId": "843901001",
    "entityType": "Track",
    "nonce": "0x2d45870da4024a38fdf645e016f6d7f5a66b6e08b02f9e43d7b8dd9a9d108148",
    "signature": "0x846e4ed75cb21f3d0402515b3f53ea054489cddb432075512fcc17fbeee88f0f4b531c121f6762095a083f162e0d244e20b3f467f549646b1c3d4b8cf8d43b321c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}