{
  "manageEntity": {
    "action": "Save",
    "entityId": "330453131",
    "entityType": "Track",
    "nonce": "0x72ccf63054c34886e927b530e4711873caf3e78da8e490aacf8349903189d659",
    "signature": "0xc2545ed8c1eb96a6851060b0b8ac314761e9945c56ca27db511014449cdf396822d071735e79a8fb35f15e11382aaeabdaaf20d1969e399c84074e9423835a511c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}