{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425609221",
    "entityType": "Track",
    "nonce": "0xb33b294cbccf1cea867be2a4f758f20233c1c075f41fb5a384133c5a93b342ff",
    "signature": "0x16daa92e7b54456fddbe17223cbfa26759283a191bdfea6e91fc01e34fcadf574d2651a652ec43bb5fa90f1ff4e1717ebdfb3fb54676f1fed4170475a793da591b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}