{
  "manageEntity": {
    "action": "Save",
    "entityId": "692380412",
    "entityType": "Track",
    "nonce": "0x8f24f0baec581acea79a7103b62a5b7988e4862be0d9ea294c83c0875274d6e4",
    "signature": "0xd3a7de7fdc2c7244529a586c383110b21f5a61a32a38b7d151769c6d7291dc851644e36e8696b332fcf5fe34fb2dc2101f3670b5ede6a11c50ee5bd0bcbc01e71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}