{
  "manageEntity": {
    "action": "Save",
    "entityId": "51357",
    "entityType": "Track",
    "nonce": "0x1ec086edb63f9e795959fb9af3209f521ae7d6b6bbeddee74648f5388b1b2430",
    "signature": "0xb43dec206ecc3e705d6fe080dd1e5668f4832b7384f2c39ec734cbcb741ce6c350e7502ba912a0b7400597508a7e12e3f1134f859f1cdd074631b607a0cb55511c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}