{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820965744",
    "entityType": "Track",
    "nonce": "0x2137809487394a90b735a98a80c9707ef731bb2dec752e46fc8b991c393b9dd8",
    "signature": "0x288f46ad43ca230de339ce752c5acac67eccff5461020c674a3f3a41d4d9c4dc103442d698720b1a420ce128298b9ca0df6e7eba635add26742b1aa97b2f65091b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}