{
  "manageEntity": {
    "action": "Save",
    "entityId": "353229050",
    "entityType": "Track",
    "nonce": "0x2c82b2fc6ab1efd3e379dc0292f8ba392b03d8847263e6aea07af32756605218",
    "signature": "0x32cde5e8a09e2c8be96e9247cebd5e392fd9c6b9341446618a0d1c796002dbf24b2014242d2795763f84642239b78aae549ff0cfb494a676c770f05be5c84dd01c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}