{
  "manageEntity": {
    "action": "Save",
    "entityId": "1972947245",
    "entityType": "Track",
    "nonce": "0xca540adb90147d4b7749e2546a890d8336075bd7d9878cc42364ba68c960abb4",
    "signature": "0xc8c0fda6c9a92e9c4de26b344ea9a9a6cc919eca04e695a27f7f02d1075a01633a12d47608258d08c61f471513a8c47ac422a8a320d9c6db2071f31f8bc886131c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}