{
  "manageEntity": {
    "action": "Save",
    "entityId": "596421083",
    "entityType": "Track",
    "nonce": "0xa331e12d62fe468fff6934dc865e51af1c4b100e5e175681a23241827fff0a1e",
    "signature": "0xdf51ecf470dd98d15bfc42319b68f7fd5fc411180dca256518625de52fe1e6e8581c4a6649c1e93e0a8920cee1b61820d9c287aec64d68284d44592f8e73e9131b",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}