{
  "manageEntity": {
    "action": "Save",
    "entityId": "569407002",
    "entityType": "Track",
    "nonce": "0xf5daca24db96976efa1a6a8cde6c200eb5c796d2699f6c51271836f7b92a7b88",
    "signature": "0xbbcab40cb6b2799e0e323a0b40b1f91e91843ce72230f90fcf285451a3e2183400553a217a66613b634792eb4f6626017ae18de1f67fb0fbe56bb4ce01f9fca91b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}