{
  "manageEntity": {
    "action": "Save",
    "entityId": "413319",
    "entityType": "Track",
    "nonce": "0x8f5a22a5743b1ca23116b46aad70c8a34aa4fadb37c82a3701ad5c9e2d5b09ba",
    "signature": "0xca931d87e7d1a00f0be6a25905dbebf4ecf3fd9faf10e598466c309de046f89d5c055df67a7faac85dbca7beed76d0fba0ed7b17fd392fc28bccd06bfdb0fd531c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}