{
  "manageEntity": {
    "action": "Save",
    "entityId": "2142349774",
    "entityType": "Track",
    "nonce": "0x9601383ecfd2d361b2e693bf505ef3e6bca0a45486d7cd32a7605259215f219c",
    "signature": "0x81758fc68242442d4d40d27851ae6ec4fc9770027ba197c8f6236e932f6321ef7275010ed5fff616864698b10f1ef276733f4c1780b9abaf85b9109bd03604501b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}