{
  "manageEntity": {
    "action": "Save",
    "entityId": "925446057",
    "entityType": "Track",
    "nonce": "0x9cad2d8c264bb070130addbe8e082f3bb96959f2940f9006432274a400c77568",
    "signature": "0xabcd1519132e0dedf3f48bb14f833c190e6009f4f024f95daa9acba8f23e8be728b8b660d286502259fc050c305f34f2b960b054df9c32648509ea0d0a107de11c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}