{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031391315",
    "entityType": "Track",
    "nonce": "0x5321b5ecd2bb50e4ade7db807b179c3390ad7f98605c2bf66dd55d9d3086166a",
    "signature": "0x90b5e20278e24aaa58b783e9090479116a28c1942113e907306835ad335ccbee6d3196d006612205b8f0ce13d6380ed95474386feed554917ccee1f6e0fbc38f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}