{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591446004",
    "entityType": "Track",
    "nonce": "0xca533b5efc819433a64415f818068fe14461e9ff545a6335c78261900b60ec69",
    "signature": "0x3edc115eaf1c8a3dcf269b606cc537e5f8a389f91a2aba9dc7759d632c6fc0da436372e68579f32c367dda7372e0eca370177958f4bb7363f5b4ab66720cfdc91c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}