{
  "manageEntity": {
    "action": "Save",
    "entityId": "2049740396",
    "entityType": "Track",
    "nonce": "0xcdb3d997a855904d0491833f638b6811c85d4677d016833dc07488a109f5604a",
    "signature": "0xceb0ee8de930820a074e1d8c7b3e9077f2d6a010548ff8f6552002929632800a72f098d873078eb69481b683b1f68546a51651accb3c4b4a0bdc58327958e5ed1c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}