{
  "manageEntity": {
    "action": "Save",
    "entityId": "1392115923",
    "entityType": "Track",
    "nonce": "0x281f91afcafd2a92a9dad8a56a24f9dc9693bea4ae181cbd85cf613664683f34",
    "signature": "0xbe68f7537c251d0ad7a87ec04652346845b4b355bbe1899bbaed9b1dc4698a4f6c98d5fa870c0737ad9f6d31b7e36d552994659ae23588cfcfd90ed546a2449b1b",
    "signer": "0xaBca4973b8911Fb110a95E6e00e5BBFBCa671473",
    "userId": "832058678"
  }
}