{
  "manageEntity": {
    "action": "Save",
    "entityId": "214771",
    "entityType": "Track",
    "nonce": "0xeac6e88f4985e9f5a2d7e37f186ad7410500ad7dfd886e033945f6e613722170",
    "signature": "0x56e2fb42a35c80ed01da015ad664bfe9a05fb662c73c69c09962bac3496cb5ac53c1a1b45767d5ebb1671560dcd978dce6be8c02e0139fcb7589d95629c63e551c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}