{
  "manageEntity": {
    "action": "Save",
    "entityId": "592578032",
    "entityType": "Track",
    "nonce": "0x1a4a29a5d3d9cc3b5e4f3294b9e832fc5fda509a88676db4db5a20c0b9465db2",
    "signature": "0xe9f2dae267fbf435224ca0aa84600d2139060ba3a4630aa0538bee5892361e9a461ef74e75255f8002563edb1565237f7cba35d977f3ab17216a097729f15e451c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}