{
  "manageEntity": {
    "action": "Save",
    "entityId": "1619812059",
    "entityType": "Track",
    "nonce": "0xd7fc0b156517dfb82d664545e3579230d42410c4d90cd9383839cb8d0bdec0ae",
    "signature": "0x36a9cf6bd3bda50bb7d802dca2b24aecdeffe5503c65a4111403e994eacf99a30bbe51c3f73d73a4702a60a6381a2ef90271c28af935df6b26060aeebaf81d0c1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}