{
  "manageEntity": {
    "action": "Save",
    "entityId": "1902594133",
    "entityType": "Track",
    "nonce": "0xdd260681215270d64d736c3ef46b8f5d1d53cee7ffb24d40414657569d79e093",
    "signature": "0x88b3e528de964171557b952ae4143b647fbab248ab7ab227028ffce214d470f818b8c6557121549e625d871cf338ba952ef755fdc82f5a9ca2a4de6648b1ec891b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}