{
  "manageEntity": {
    "action": "Save",
    "entityId": "226817053",
    "entityType": "Track",
    "nonce": "0x945f3920f43215af915764dd62fe447b5295cb6159decc6a401f788ab90e119a",
    "signature": "0xc78307ccda9ea852ddca28157fa47343abde6e559068adb218be503caeb2feee2c506a0a65a06e6039eba0b19c317e0384fa2d956abb4870bf47367c9b9c4edd1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}