{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264066407",
    "entityType": "Track",
    "nonce": "0x7f3974a18d3f9de9b29021fcb04cd44caa093db2a4f87f2ed79e052787929330",
    "signature": "0x570b11289b3fa2aaf15976991f9a24ae0b4e84f3569d0ac357c854fcaf8c4e735a91dd409a5463727ea065e3d4117150bb9b429b3ffde8f834895fc736cacec41c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}