{
  "manageEntity": {
    "action": "Save",
    "entityId": "1759403838",
    "entityType": "Track",
    "nonce": "0x75836f0587de57a84de8821c3eb2778af4b98a2e738fd89255f993204b52e2f2",
    "signature": "0x8e12a034e10e5d253cc4695c2ad35fddb2f3f6687125d14f674e2c033070543e4e722960d99fcc867f9a3bd824da7e1aa988246fd26da7adca54a54c4c43b5a51c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}