{
  "manageEntity": {
    "action": "Save",
    "entityId": "51334",
    "entityType": "Track",
    "nonce": "0x8d7d80b61fb5bcd492b51c489648c7219606445757f085f6dced23618819e529",
    "signature": "0xc377eadf8a346bcfcfbe79e6e2b17c853e6ea5fbf2eaf870032f62f9aebf86c91042d1f5f44f0eda6ae9767fd17c3476d837060ef407023ae8137e265702c0b81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}