{
  "manageEntity": {
    "action": "Save",
    "entityId": "81241",
    "entityType": "Track",
    "nonce": "0x9925569507cd9fe200512aa7ca5d0bb75e62e81e5e332842bfa4621a98e27c00",
    "signature": "0x7e6ca9c73d672edf585bbb071d5e51afd0b0cdd9d590a733fd0d801c2d6e54b66a050382982345ca6ef7a1e2db03c648821c75908a10fa2d30c6ec4af724ccf21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}