{
  "manageEntity": {
    "action": "Save",
    "entityId": "203589699",
    "entityType": "Track",
    "nonce": "0x310e1e819cf87668455d3865c203705032dd93b5103d9902a752529dc39cba7a",
    "signature": "0x53ed08430b865505b146f951b7a249bf320d526269e8355ce1b2166e7aa8a1e2514a1fac32c56240f8fa1e958b759b49ddf18eababb2a083259e60fb6c1572cc1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}