{
  "manageEntity": {
    "action": "Save",
    "entityId": "1377210325",
    "entityType": "Track",
    "nonce": "0xed65f5fcf4aebe808265c06920e258344ffbbffac758fe9d81418fc31fab4149",
    "signature": "0xc004cbbf1c080704b653dcec4b364c1b9a557c71e9ae069df08093f23ac245bf5f07c3c04d4e162f275d50ea6b4c8c6be3d045158c000ab163855917c94c65891c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}